What you should know when choosing non-toxic hair straighteners & smoothing treatments on Welpr:

  • Only the cleanest products make it onto Welpr.
  • We use a score called the Welpr Rating to rank each product.
  • The Welpr Rating is based on math, not opinion, ensuring it's free from human bias.
The Welpr Rating is determined by a scoring formula. The formula takes into account the products safety, user satisfaction, and eco-ethical standing. Click here to learn more.
Our Methodology and Ratings

Find Non-Toxic Hair Straightener & Smoothing Treatment

Third-party certifications are key indicators of a product's safety, ethics, and environmental impact. Click the icon to verify the certification.

Highlights aren't always verifiable, so you're trusting the brand when they say "lead free", etc. If the highlight icon is "clickable", it means we've verified the highlight.

User satisfaction is calculated using online reviews and a Bayesian average across all personal care and cosmetic products on Welpr.

Brazilian Keratin Smoothing Therapy Hair Treatment Oil - Herbcience

Brazilian Keratin Smoothing Therapy Hair Treatment Oil - Herbcience
Welpr Rating
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Welpr rating icon
4.95
/5
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Certifications

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<p>The Made Safe certification ensures that products are free from harmful chemicals and prioritize human health and ecosystem safety. <a href="https://madesafe.org/products/herbcience-replenishing-pro-v-keratin-hair-oil?_pos=7&_sid=eb311316f&_ss=r" target="_blank">Source</a>.</p>
<p>The COSMOS Natural certification signifies that a product meets the overall COSMOS-standard for natural cosmetics but does not contain the minimum required percentage of organic ingredients specified for organic certification. <a href="https://www.cosmos-standard.org/en/databases/products-directory/?commercial_name=&company=&brand=38844&certification_body=&country=&cosmos_signature=NATURAL" target="_blank">Source</a>.</p>

Highlights

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<p>The Vegan label indicates that a brand says their product does not contain animal-derived ingredients, but without certifications such as Certified Vegan, it cannot be verified.</p>

User Satisfaction

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We only include products on Welpr that are the best of the best. An EXCELLENT user satisfaction score indicates the product is in the top third of the best products.
Est. Price
$29.99

Product Details

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  • Suitable for dry, frizzy hair

Pros & Cons

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Pros Mentioned

  • Restorative
  • Hydrating
  • Affordable

Cons Mentioned

  • Ineffective

Ingredients

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Ingredients can vary by product variation and may change at any time by the manufacturer. For the most complete and up-to-date list of ingredients, refer to the product packaging.


To analyze individual ingredients, use INCIDecoder.


Ingredients: Cyclopentasiloxane, Dimethiconol, Isopropyl Myristate, Hydrolyzed Keratin, Parfum/Fragrance, Butylphenyl Methylpropional, Hexyl Cinnamal, Linalool

Third-party certifications are key indicators of a product's safety, ethics, and environmental impact. Click the icon to verify the certification.

Highlights aren't always verifiable, so you're trusting the brand when they say "lead free", etc. If the highlight icon is "clickable", it means we've verified the highlight.

User satisfaction is calculated using online reviews and a Bayesian average across all personal care and cosmetic products on Welpr.

Keratin Smooth Hair Mask - Luseta

Keratin Smooth Hair Mask - Luseta
Welpr Rating
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Welpr rating icon
4.7
/5
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Highlights

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<p>The Cruelty-Free label indicates that a product says their product is free from animal testing, but without certifications such as PETAs Beauty Without Bunnies or Leaping Bunny, it cannot be verified.</p>

User Satisfaction

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We only include products on Welpr that are the best of the best. An EXCELLENT user satisfaction score indicates the product is in the top third of the best products.
Est. Price
$17.79

Product Details

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  • Infused with keratin, designed for damaged and dry hair.
  • Moisturizing and repairing formula promotes growth and health.
  • Provides deep nourishment for softer locks.
  • Protects hair from environmental damage.
  • Safe for colored hair.
  • Free of sulfates, parabens, and gluten.
  • Use recommendation: After shampooing, apply generously to damp hair, leave for up to 5 minutes, then rinse. For best results, use weekly.
  • Not tested on animals.

Pros & Cons

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Pros Mentioned

  • Hydrating
  • Softening
  • Shiny

Cons Mentioned

  • Frizzy

Ingredients

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Ingredients can vary by product variation and may change at any time by the manufacturer. For the most complete and up-to-date list of ingredients, refer to the product packaging.


To analyze individual ingredients, use INCIDecoder.


Ingredients: Water (Aqua, Eau), Cetearyl Alcohol, Steartrimonium Chloride, Dimethicone, Amodimethicone, Parfum, Dimethiconol, Benzyl Alcohol, Trideceth-12, Hydrolyzed Keratin, Phenoxyethanol, Cetrimonium Chloride, Sodium Benzoate, Alcohol, Tetrasodium Edta, Cetyl Hydroxyethylcellulose, Citric Acid, Chenopodium Quinoa Seed Extract, Cocodimonium Hydroxypropyl Hydrolyzed Keratin, Butylene Glycol, Potassium Sorbate

Third-party certifications are key indicators of a product's safety, ethics, and environmental impact. Click the icon to verify the certification.

Highlights aren't always verifiable, so you're trusting the brand when they say "lead free", etc. If the highlight icon is "clickable", it means we've verified the highlight.

User satisfaction is calculated using online reviews and a Bayesian average across all personal care and cosmetic products on Welpr.

Silk Smoothing Balm With Keratin, Hydrolyzed Silk & Coconut Oil - Pure Brazilian

Silk Smoothing Balm With Keratin, Hydrolyzed Silk & Coconut Oil - Pure Brazilian
Welpr Rating
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4.7
/5
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Highlights

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<p>The Cruelty-Free label indicates that a product says their product is free from animal testing, but without certifications such as PETAs Beauty Without Bunnies or Leaping Bunny, it cannot be verified.</p>

User Satisfaction

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We only include products on Welpr that are the best of the best. An EXCELLENT user satisfaction score indicates the product is in the top third of the best products.
Est. Price
$30.00

Product Details

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  • Rich lightweight formula controls and softens unruly hair.
  • Helps hair achieve a silky, straight style.
  • Protects hair from frizz caused by humidity.
  • Provides a natural, sleek shine.
  • Leaves hair with natural moisture and softness.
  • Heat and humidity-resistant, ensuring hair remains light and bouncy.
  • Regular use before styling makes hair faster drying and more manageable.
  • Reduces tangles and frizz while improving hold and smoothness.
  • Designed for at-home maintenance of salon treatments or standalone use.

Pros & Cons

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Pros Mentioned

  • Shiny
  • Soft
  • Fresh-scented

Cons Mentioned

  • Volume-reducing

Ingredients

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Ingredients can vary by product variation and may change at any time by the manufacturer. For the most complete and up-to-date list of ingredients, refer to the product packaging.


To analyze individual ingredients, use INCIDecoder.


Ingredients: Aqua (Water/Eau), Dimethicone, Cyclopentasiloxane, Propylene Glycol, Dimethiconol, Phenyl Trimethicone, Phenoxyethanol, PEG-12 Dimethicone, Polyacrylamide, Parfum (Fragrance), PPG-2 Myristyl Ether Propionate, Aloe Barbadensis Leaf Juice, Panthenol, C13-14 Isoparaffin, Hydrolyzed Silk, Hydrolyzed Keratin, Keratin Amino Acids, Pearl Powder, Tocopheryl Acetate, Laureth-7, Cocos Nucifera (Coconut) Oil, Ricinus Communis (Castor) Seed Oil, Coumarin, Geraniol, Butylphenyl Methylpropional, Linalool, Hexyl Cinnamal, Limonene, Alpha-Isomethyl Ionone

Third-party certifications are key indicators of a product's safety, ethics, and environmental impact. Click the icon to verify the certification.

Highlights aren't always verifiable, so you're trusting the brand when they say "lead free", etc. If the highlight icon is "clickable", it means we've verified the highlight.

User satisfaction is calculated using online reviews and a Bayesian average across all personal care and cosmetic products on Welpr.

LOVE Hair Smoother - Davines

LOVE Hair Smoother - Davines
Welpr Rating
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Welpr rating icon
4.7
/5
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Certifications

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<p>The B Corp certification indicates that a company meets high social and environmental standards. <a href="https://www.bcorporation.net/en-us/find-a-b-corp/company/davines/" target="_blank">Source</a>.</p>

Highlights

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<p>The Cruelty-Free label indicates that a product says their product is free from animal testing, but without certifications such as PETAs Beauty Without Bunnies or Leaping Bunny, it cannot be verified.</p>

User Satisfaction

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We only include products on Welpr that are the best of the best. An EXCELLENT user satisfaction score indicates the product is in the top third of the best products.
Est. Price
$31.00

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Pros & Cons

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Pros Mentioned

  • Smooth
  • Scent
  • Manageable

Cons Mentioned

  • Overpowering

Ingredients

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Ingredients can vary by product variation and may change at any time by the manufacturer. For the most complete and up-to-date list of ingredients, refer to the product packaging.


To analyze individual ingredients, use INCIDecoder.


Ingredients: Aqua / Water / Eau, Dimethicone, Propylene Glycol, Cyclopentasiloxane, Disiloxane, Phenylpropyldimethylsiloxysilicate, Glycerin, Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Benzyl Alcohol, Cyclohexasiloxane, Polyacrylamidomethylpropane Sulfonic Acid, Simmondsia Chinensis Seed Oil / Simmondsia Chinensis (Jojoba) Seed Oil, Panthenol, Ethylhexyl Methoxycinnamate, Polyquaternium-28, Parfum / Fragrance, Triethanolamine, Dicaprylyl Ether, Dimethiconol, Lauryl Alcohol, Disodium EDTA, Buteth-3, Sodium Benzoate, Sclerotium Gum, Creatine, Olea Europaea Fruit Extract / Olea Europaea (Olive) Fruit Extract, Sodium Benzotriazolyl Butylphenol Sulfonate, Mica, CI 77891 / Titanium Dioxide, Caprylyl Glycol, Phenoxyethanol, Limonene, Alcohol, Tributyl Citrate, Citric Acid, Tris(Tetramethylhydroxypiperidinol) Citrate, CI 60730 / Ext Violet 2, CI 19140 / Yellow 5, CI 14700 / Red 4

Third-party certifications are key indicators of a product's safety, ethics, and environmental impact. Click the icon to verify the certification.

Highlights aren't always verifiable, so you're trusting the brand when they say "lead free", etc. If the highlight icon is "clickable", it means we've verified the highlight.

User satisfaction is calculated using online reviews and a Bayesian average across all personal care and cosmetic products on Welpr.

Smoothing Hair Treatment - Grown Alchemist

Smoothing Hair Treatment - Grown Alchemist
Welpr Rating
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Welpr rating icon
4.6
/5
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Certifications

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<p>The PETA certification identifies cosmetics, personal-care, and household products as cruelty-free ensuring no animal testing or animal-derived ingredients are used worldwide. <a href="https://crueltyfree.peta.org/company/grown-alchemist/" target="_blank">Source</a>.</p>
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User Satisfaction

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We only include products on Welpr that are the best of the best. A GREAT user satisfaction score indicates the product is in the middle third of the best products.
Est. Price
$33.00

Product Details

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  • Formulated to smooth hair, eliminate flyaways, and protect against damage from heat styling.
  • Enhances natural hair appearance, leaving it silky smooth and hydrated.
  • Enriched with Hydrolyzed Milk Protein and Pro-Vitamin A to increase styling manageability and provide essential nutrients to the hair follicle.
  • Contains Cationic Guar Gum that smooths and detangles hair without build-up.
  • Includes Edelweiss Extract and Sambucus which condition the scalp and increase hair health, visibly smoothing and conditioning the hair.
  • Formulated with plant-derived Liposomes that optimize the delivery of actives for healthier, smoother hair.
  • Recommended for use after straightening iron or other heat styling tools.
  • Part of Grown Alchemist’s organic, non-toxic, vegan, and cruelty-free product line.

Pros & Cons

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Pros Mentioned

  • Soft
  • Beautiful
  • Morbidi

Cons Mentioned

  • Dry

Ingredients

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Ingredients can vary by product variation and may change at any time by the manufacturer. For the most complete and up-to-date list of ingredients, refer to the product packaging.


To analyze individual ingredients, use INCIDecoder.


Ingredients: Aqua/Water/Eau, Behentrimonium Methosulfate (*Plant), Decyl Oleate (*Plant), Sodium Lactate (*Plant), Lactic Acid (*Plant), Sodium Chloride, Glycerin (*Plant), Levulinic Acid, P-Anisic Acid (*Plant), Cetyl Alcohol (*Plant), Camellia Oleifera Seed Oil, Cetearyl Alcohol (*Plant), Behentrimonium Chloride (*Plant), Starch Hydroxypropyltrimonium Chloride (*Plant), Aloe Barbadensis Leaf Extract, Urea, Leontopodium Alpinum (Edelweiss) Extract (*Plant), Sambucus Nigra (Elderberry) Fruit Extract (*Plant), Panthenol (Pro-Vitamin B5) (*Plant), Cetrimonium Chloride (*Plant), Benzyl Alcohol, Dehydroacetic Acid, Beta Carotene (Provitamin A/Provitamine A), (*Plant), Citrus Clementina (Clementine) Peel Oil, Pogostamon Cablin (Patchouli) Leaf Oil, Polianthes Tuberosa (Tuberose) Flower Oil, Cananga Odorata (Ylang Ylang) Flower Oil, Cedrus Atlantica (Cedarwood) Wood Oil, Benzyl Benzoate (*Plant/Plante), Geraniol (*Plant), Linalool (*Plant), Limonene (*Plant) (*Plant Derived)

Third-party certifications are key indicators of a product's safety, ethics, and environmental impact. Click the icon to verify the certification.

Highlights aren't always verifiable, so you're trusting the brand when they say "lead free", etc. If the highlight icon is "clickable", it means we've verified the highlight.

User satisfaction is calculated using online reviews and a Bayesian average across all personal care and cosmetic products on Welpr.

Express Blonde Keratin Smoothing Treatment - Cezanne

Express Blonde Keratin Smoothing Treatment - Cezanne
Welpr Rating
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Welpr rating icon
4.55
/5
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User Satisfaction

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We only include products on Welpr that are the best of the best. A GREAT user satisfaction score indicates the product is in the middle third of the best products.
Est. Price
$184.99

Product Details

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  • Smoothing and strengthening treatment for all hair types
  • Formaldehyde-free formula, gentle and safe for sensitive skin
  • Unisex formula, suitable for both men and women's hair
  • Contains keratin to restore elasticity and manage frizz

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Ingredients

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Ingredients can vary by product variation and may change at any time by the manufacturer. For the most complete and up-to-date list of ingredients, refer to the product packaging.


To analyze individual ingredients, use INCIDecoder.


Ingredients: Water (Aqua) (Eau), Glyoxylic Acid, Propylene Glycol, Shea Butter Cetyl Esters, Distearoylethyl Dimonium Chloride, Argania Spinosa Kernel Oil*, Theobroma Cacao (Cocoa) Seed Butter, Alcohol Denat., Aloe Barbadensis Leaf Juice*, Cetearyl Alcohol, Cetyl Alcohol, Stearyl Alcohol, Methyl Gluceth-10, Silk Amino Acids, Hydrolyzed Keratin, Xanthan Gum, Propylene Glycol Dicaprylate/Dicaprate, Quaternium-87, Polyquaternium-37, Polyquaternium-47, PPG-1 Trideceth-6, Polyquaternium-67, PEG-180M, Trideceth-12, Cetrimonium Chloride, Silica, Butylene Glycol, Amodimethicone, BHT, Phenoxyethanol, Ethylhexylglycerin, Potassium Sorbate, Sodium Benzoate, Fragrance (Parfum), Benzyl Salicylate, Benzyl Alcohol, Ext. Violet 2 (CI 60730)

Third-party certifications are key indicators of a product's safety, ethics, and environmental impact. Click the icon to verify the certification.

Highlights aren't always verifiable, so you're trusting the brand when they say "lead free", etc. If the highlight icon is "clickable", it means we've verified the highlight.

User satisfaction is calculated using online reviews and a Bayesian average across all personal care and cosmetic products on Welpr.

Keratin Smoothing Masque Packette - Ion

Keratin Smoothing Masque Packette - Ion
Welpr Rating
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4.55
/5
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User Satisfaction

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We only include products on Welpr that are the best of the best. A GREAT user satisfaction score indicates the product is in the middle third of the best products.
Est. Price
$24.97

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Pros & Cons

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Pros Mentioned

  • Smoothing
  • Detangling
  • Softening

Ingredients

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Ingredients can vary by product variation and may change at any time by the manufacturer. For the most complete and up-to-date list of ingredients, refer to the product packaging.


To analyze individual ingredients, use INCIDecoder.


Ingredients: Water, Dimethicone, Cetearyl Alcohol, Behentrimonium Chloride, Vegetable Oil, Sorbitol, Cetyl Esters, Stearyl Alcohol, Glycol Stearate, Fragrance, Hydroxyethylcellulose, Hydrolyzed Keratin, Ceteareth-20, Guar Hydroxypropyltrimonium Chloride, DMDM Hydantoin, Disodium EDTA, Citric Acid, Iodopropynyl Butylcarbamate, Pyridoxine HCL, Panthenol, Prunus Amygdalus Dulcis (Sweet Almond) O, Biotin, Hexyl Cinnamal, Linalool

Third-party certifications are key indicators of a product's safety, ethics, and environmental impact. Click the icon to verify the certification.

Highlights aren't always verifiable, so you're trusting the brand when they say "lead free", etc. If the highlight icon is "clickable", it means we've verified the highlight.

User satisfaction is calculated using online reviews and a Bayesian average across all personal care and cosmetic products on Welpr.

Intense Moisturizing & Smoothing Shampoo - Rossano Ferretti Parma

Intense Moisturizing & Smoothing Shampoo - Rossano Ferretti Parma
Welpr Rating
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Welpr rating icon
4.55
/5
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Highlights

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<p>The Cruelty-Free label indicates that a product says their product is free from animal testing, but without certifications such as PETAs Beauty Without Bunnies or Leaping Bunny, it cannot be verified.</p>
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Est. Price
$155.06

Product Details

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  • A moisturizing shampoo with over 95% naturally derived ingredients.
  • Helps tame thick, curly, unruly hair.
  • Formulated with macadamia oil for soothing and calming properties.
  • Blended with avocado oil to restructure and protect hair against moisture loss and dehydration.
  • Infused with green tea, a natural antioxidant with Vitamins C, E, and Polyphenols.
  • Helps nourish, soften hair and scalp.
  • Leaves hair smooth, shiny, manageable, and healthy.
  • Free of cruelty, sulfates (SLS, SLES), parabens, and gluten.

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Ingredients

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Ingredients can vary by product variation and may change at any time by the manufacturer. For the most complete and up-to-date list of ingredients, refer to the product packaging.


To analyze individual ingredients, use INCIDecoder.


Ingredients: Aqua/Water/Eau, Laureth-5 Carboxylic Acid, Disodium Laureth Sulfosuccinate, Sodium Lauryl Sulfoacetate, Cocamidopropyl Betaine, Sodium Lauroyl Methyl Isethionate, Sodium Methyl Cocoyl Taurate, Erythritol, Sodium Hyaluronate, Camellia Sinensis Leaf Extract, Sasa Kurilensis Leaf/Stem Extract, Algin, Persea Gratissima (Avocado) Oil, Macadamia Ternifolia Seed Oil, Tocopherol, Trehalose, Serine, Pullulan, Urea, Hydrogenated Palm Glycerides Citrate, Potassium Phosphate, Coco-Glucoside, Polyquaternium-7, C12-13 Pareth-23, C12-13 Pareth-3, Pentylene Glycol, Caprylyl Glycol, Glyceryl Polyacrylate, Peg-120 Methyl Glucose Dioleate, Glyceryl Oleate, Glycerin, Disodium Phosphate, Divinyldimethicone/Dimethicone Copolymer, Methoxy Peg/Ppg-7/3 Aminopropyl Dimethicone, Citric Acid, Sodium Benzoate, Potassium Sorbate, Calcium Gluconate, Gluconolactone, Phenoxyethanol, Parfum (Fragrance)

Third-party certifications are key indicators of a product's safety, ethics, and environmental impact. Click the icon to verify the certification.

Highlights aren't always verifiable, so you're trusting the brand when they say "lead free", etc. If the highlight icon is "clickable", it means we've verified the highlight.

User satisfaction is calculated using online reviews and a Bayesian average across all personal care and cosmetic products on Welpr.

Perfect Finish Keratin Smoothing Treatment - Cezanne

Perfect Finish Keratin Smoothing Treatment - Cezanne
Welpr Rating
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4.55
/5
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User Satisfaction

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We only include products on Welpr that are the best of the best. A GREAT user satisfaction score indicates the product is in the middle third of the best products.
Est. Price
$445.25

Product Details

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  • Formaldehyde-free keratin smoothing treatment.
  • Infuses a proprietary blend of keratins, botanical extracts, vitamins, and proteins into the hair cuticle.
  • Includes sericin, a silk protein, to enhance hair smoothness.
  • Alters the curl pattern of hair for a straighter appearance.
  • Promotes healthier and more manageable hair.
  • Allows immediate hair washing with no waiting period.
  • Effectively maintains smooth, frizz-free, and silky hair for up to 3 months.

Pros & Cons

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Pros Mentioned

  • Manageable
  • Low-smoke
  • Authentic

Cons Mentioned

  • Temporary

Ingredients

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Ingredients can vary by product variation and may change at any time by the manufacturer. For the most complete and up-to-date list of ingredients, refer to the product packaging.


To analyze individual ingredients, use INCIDecoder.


Ingredients: Water (Aqua) (Eau), Glyoxyloyl Keratin Amino Acids, Glyoxyloyl Carbocysteine, Phenyltrimethicone, Stearyl Alcohol, Peg-12 Dimethicone, Glycerin, Distearoylethyl Dimonium Chloride, Niacinamide, Tocopheryl Acetate, Pyridoxine Hcl, Calcium Pantothenate, Sodium Ascorbylphosphate, Pyrus Malus (Apple) Fruit Extract, Saccharum Officinarum (Sugarcane) Extract (Extraitde Canne À Sucre), Camellia Sinensis Extract, Aloe Barbadensis Leaf Juice*, Hydrolyzed Keratin, Keratin, Silk Amino Acids, Butyrospermum Parkii (Shea) Butter, Guar Hydroxypropyltrimoniumchloride, Cetyl Alcohol, Cetearyl Alcohol, Polyquaternium-47, Silicone Quaternium-16, Undeceth-5, Undeceth-11, Betaine, Silica, Maltodextrin, Sodium Starch Octenylsuccinate, Alcohol Denat., Butyloctanol, Phenoxyethanol, Potassium Sorbate, Sodium Benzoate, Iodopropynylbutylcarbamate, Fragrance (Parfum), Linalool, Citronellol, Limonene, Alpha-Isomethyl Ionone, Benzyl Alcohol* Certified Organic*

Third-party certifications are key indicators of a product's safety, ethics, and environmental impact. Click the icon to verify the certification.

Highlights aren't always verifiable, so you're trusting the brand when they say "lead free", etc. If the highlight icon is "clickable", it means we've verified the highlight.

User satisfaction is calculated using online reviews and a Bayesian average across all personal care and cosmetic products on Welpr.

Keratin Straightening Treatment For Hair - Naturous

Keratin Straightening Treatment For Hair - Naturous
Welpr Rating
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4.5
/5
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on Amazon
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Highlights

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<p>The Cruelty-Free label indicates that a product says their product is free from animal testing, but without certifications such as PETAs Beauty Without Bunnies or Leaping Bunny, it cannot be verified.</p>

User Satisfaction

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We only include products on Welpr that are the best of the best. A GOOD user satisfaction score indicates the product is in the bottom third of the best products.
Est. Price
$39.99

Product Details

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  • Developed from research on keratin to safely and easily achieve straight hair.
  • Includes argan oil, making hair smooth, silky, and shiny.
  • Features a formaldehyde-free formula that protects, straightens, and strengthens hair.
  • Reduces blow-drying time to prevent hair damage.
  • Kit comes with a purifying & clarifying shampoo.
  • Effective for maintaining straightened hair for up to 4-6 months.
  • Advises to avoid certain hair products, accessories, and environments for one week post-treatment to maintain hair condition.

Pros & Cons

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Pros Mentioned

  • Softening
  • Straightening
  • Smoothing

Cons Mentioned

  • Sticky

Ingredients

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Ingredients can vary by product variation and may change at any time by the manufacturer. For the most complete and up-to-date list of ingredients, refer to the product packaging.


To analyze individual ingredients, use INCIDecoder.


Ingredients: Aqua, Cetearyl Alcohol, Beeswax, Theobroma Cacao (Cacao), Octyldodecanol, Glycerin, Ceteareth-20, Fragrance, Ascorbic Acid (Vitamin C), Tetrasodium EDTA, Argania Sinosa (Argan) Kernel Oil, Potassium Sorbate

Third-party certifications are key indicators of a product's safety, ethics, and environmental impact. Click the icon to verify the certification.

Highlights aren't always verifiable, so you're trusting the brand when they say "lead free", etc. If the highlight icon is "clickable", it means we've verified the highlight.

User satisfaction is calculated using online reviews and a Bayesian average across all personal care and cosmetic products on Welpr.

a-Keratin Smoothing And Refinishing Treatment - Peter Coppola

a-Keratin Smoothing And Refinishing Treatment - Peter Coppola
Welpr Rating
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4.5
/5
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Highlights

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<p>The Cruelty-Free label indicates that a product says their product is free from animal testing, but without certifications such as PETAs Beauty Without Bunnies or Leaping Bunny, it cannot be verified.</p>

User Satisfaction

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We only include products on Welpr that are the best of the best. A GOOD user satisfaction score indicates the product is in the bottom third of the best products.
Est. Price
$71.99

Product Details

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  • Quickly removes frizz and strengthens hair.
  • Formulated to provide smoother, stronger, age-defying hair.
  • Nourishes, repairs, and shields hair from processing, heat styling, UV exposure, and daily styling damage.
  • Safely smooths hair and improves appearance and manageability for up to three months.
  • Infuses keratin proteins and enriched with shea butter for strong, smooth, and healthy hair.
  • Free from formaldehyde, aldehydes, parabens, gas byproducts, and non-carcinogenic.
  • Reduces frizz and curls, leaving hair soft, silky, and manageable for up to 3 months.
  • Changes the texture of all hair types allowing for a variety of styles.
  • Restores damaged hair to healthy, youthful appearance.
  • Creates a barrier for thermal protection against various hair damages.

Pros & Cons

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Pros Mentioned

  • Effective
  • Easy
  • Natural

Cons Mentioned

  • Smell

Ingredients

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Ingredients can vary by product variation and may change at any time by the manufacturer. For the most complete and up-to-date list of ingredients, refer to the product packaging.


To analyze individual ingredients, use INCIDecoder.


Ingredients: Aqua, Silicone Quaternium-16/Glycidoxy Dimethicone Crosspolymer, Undeceth-11, Undeceth-5, 1,3-Butylene Glycol, Polyquaternium-37, Propylene Glycol Dicaprylate/Dicaprate, PPG-1 Trideceth-6, PEG-12 Dimethicone, Caprylyl Glycol, Phenoxyethanol, Hexylene Glycol, Glycereth-26, Panthenol, Parfum, Keratin, Hydrolyzed Keratin, Aloe Barbadensis Leaf Extract, Glycerin, Saccharum Officinarum Extract, Malva Sylvestris Flower Extract, Cystoseira Compressa Extract, Urtica Dioica Leaf Extract, Yucca Schidigera Root Extract, Equisetum Arvense Extract, Melissa Officinalis Leaf Extract, Chenopodium Quinoa Seed Extract, Cocos Nucifera Oil, Argania Spinosa Kernel Oil, Hydrolyzed Wheat Protein, Olea Europaea Fruit Oil, Benzyl Salicylate, Limonene, Linalool, Citronellol

Third-party certifications are key indicators of a product's safety, ethics, and environmental impact. Click the icon to verify the certification.

Highlights aren't always verifiable, so you're trusting the brand when they say "lead free", etc. If the highlight icon is "clickable", it means we've verified the highlight.

User satisfaction is calculated using online reviews and a Bayesian average across all personal care and cosmetic products on Welpr.

Smoothing Keratin Hair Treatment - GK Hair

Smoothing Keratin Hair Treatment - GK Hair
Welpr Rating
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Welpr rating icon
4.45
/5
Buy Now
Buy Now
on Amazon
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User Satisfaction

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We only include products on Welpr that are the best of the best. A GOOD user satisfaction score indicates the product is in the bottom third of the best products.
Est. Price
$64.90

Product Details

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  • Rejuvenates hair making it smooth, strong, and frizz-free with results lasting 3-5 months.
  • Can be applied at home or in a salon setting.
  • Utilizes natural seed oils for natural hair smoothing and repairing damage from within.
  • Includes necessary products such as GK Hair pH+ Clarifying Shampoo, The Best Keratin Treatment, Moisturizing Shampoo, Moisturizing Conditioner, and a Deep Conditioner sachet.
  • No waiting time required after application before washing hair again.
  • Reduces natural curl pattern and closes hair cuticle to eliminate frizz.
  • Formulated with Juvexin, an anti-aging keratin protein that provides hair protection and moisture, enhancing shine and vitality.
  • Contains enriching natural ingredients like Pentaclethra seeds, Astrocaryum murumuru, and coconut for nourishment and moisture retention.
  • Included step-by-step application guide ensures optimal product effectiveness.
  • After treatment, clients may wash their hair at any time using GKHair Shampoos and Conditioners to maintain treatment results.

Pros & Cons

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Pros Mentioned

  • Moisturizing
  • Manageable
  • Easy

Cons Mentioned

  • Frizzy

Ingredients

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Ingredients can vary by product variation and may change at any time by the manufacturer. For the most complete and up-to-date list of ingredients, refer to the product packaging.


To analyze individual ingredients, use INCIDecoder.


Ingredients: Aqua, Glyoxylic Acid, Glyceryl Stearate SE, Propylene Glycol, Behentrimonium Chloride, Cetyl Alcohol, Paraffinum Liquidum, Cetrimonium Chloride, Cetearyl Alcohol, Polysorbate 60, Glycerin, Potassium Stearate, Isopropyl Alcohol, Lycium Barbarum Fruit Extract, Myristyl Alcohol, Panthenol, Hydrolyzed Rice Protein, Copaifera Officinalis Resin, Creatine, Dimethicone, Cera Alba, Argania Spinosa Kernel Oil, Tocopheryl Acetate, Stearamidopropyl Dimethylamine, Hydrolyzed Silk, Hydrolyzed Wheat Protein, Cocos Nucifera Oil, Disodium EDTA, Benzotriazolyl Dodecyl P-Cresol, Octadecyl Di-T-Butyl-4-Hydroxyhydrocinnamate, Hydrolyzed Keratin, Oxidized Keratin, Keratin (Hydrolyzed Keratin), Sodium PCA, Sodium Lactate, Arginine, Aspartic Acid, PCA, Gardenia Taitensis Flower, Glycine, Alanine, Stearic Acid, Serine, Valine, Threonine, Proline, Isoleucine, Histidine, Phenylalanine, Amyl Cinnamal, Benzyl Benzoate, Benzyl Salicylate, Butylphenyl Methylpropional, Citronellol, D-Limonene, Hexyl Cinnamal, Linalool

Our Product Rating System

Our Product Rating System

First, Camille (co-creator of Welpr) hand picks cleaner product options from a variety of sources.

Next, we collect information about each product's safety, consumer satisfaction, and eco-ethical standing.

Finally, we run all this information through an algorithm that calculates the Welpr Rating.

Welpr Rating:

5.0/5

The Welpr Rating takes into account 3 things:

  1. Product Safety
  2. Consumer Satisfaction
  3. Ethics & Environment
Product safety

Part 1: Product safety

We evaluate safety information from 3rd party organizations (e.g. EWG, Made Safe, etc.). Instead of relying solely on any one of these companies for safety information, we assess all of them.

Consumer satisfaction

Part 2: Consumer satisfaction

We scour the web for consumer ratings and reviews to verify products are not only cleaner options, but also effective. Products can either be Above Average, Average, or Below average for their respective category (e.g. cleaning products).

Ethics & Environment

Part 3: Ethics & Environment

When you buy a product, you’re supporting that company with your dollars. We believe it’s important to support ethical companies, so we pool together certifications that verify a company's ethics and environmental impact.

Common Harmful Chemicals in Hair Straightener & Smoothing Treatment

Chemical Name

Why it’s harmful

Phthalate

Phthalates, linked to endocrine disruption, reproductive toxicity, and cancer, are banned in the European Union but remain prevalent in U.S. cosmetics. They are widely used in personal care products, such as nail polish, fragrances, and eyelash glue and other products. A significant loophole allows phthalates to be added to fragrances without disclosure. Health concerns include endocrine disruption, developmental and reproductive toxicity, and potential carcinogenicity.

Sodium Laureth Sulfate

Sodium laureth sulfate, derived from ethoxylated lauryl alcohol, is a surfactant used in sudsy products like toothpaste, detergents, and shampoos. While it acts as a cleansing and emulsifying agent, it can sometimes contain toxic impurities such as 1,4-dioxane. This chemical has raised health concerns due to its potential to cause skin, lung, and eye irritation, organ toxicity, and, primarily because of contamination by 1,4 dioxane, cancer.

Sodium Lauryl Sulfate

Sodium Lauryl Sulfate is recognised as a skin, eye, and respiratory tract irritant according to ICSC. It may cause allergic reactions and eye irritation as stated by the HSDB. Exposure may even result in eye burns, as per CAMEO. Depending on its form - which may range from a solid (90-98% purity), to a paste (30-41%), or an aqueous solution (28-50%) - it can significantly irritate skin and eyes, with adverse effects escalating with increased concentration. Despite these hazards, it is not a skin sensitizer according to CHEMINFO, while eChemPortal: ERMA and MSDSonline endorse its classification as an irritant.

Triclosan

Triclosan is a synthetic pesticide with antibacterial properties commonly added to detergents, soaps, and various personal care products such as deodorants and toothpastes. Although it lacks the ability to combat viruses causing colds and flus, it's used in products like body washes, disinfectants, and some toothpastes to resist bacterial growth. In 2016, the FDA limited its use in antibacterial soaps, but the compound is still permitted in other products. The European Union prohibited its presence in food-contact items in 2010. Exposure to triclosan has been associated with hormone disruption, increased breast cancer risk, liver damage, and the development of resistant super-germs.

Sources: 
Benzene

Benzene is a colorless, sweet-smelling, highly flammable liquid that evaporates quickly into the air and slightly dissolves in water. It's a byproduct of both natural processes and human activities, used extensively in the U.S production of other chemicals for plastics, resins, nylon, rubbers, lubricants, dyes, detergents, drugs, and pesticides. Present in crude oil, gasoline, and cigarette smoke, benzene is also released into the air from burning coal, oil, gasoline stations, and vehicle exhaust. Short-term exposure may cause drowsiness, dizziness, and irritation, while long-term exposure leads to blood disorders, reproductive effects, and even leukemia. Benzene has been classified by EPA as a known human carcinogen, and regulations apply to various industry sectors with potentially high exposure risks.

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Triethanolamine

Triethanolamine appears to cause occupational asthma and allergic contact dermatitis in machinists and photographers, as well as liver and kidney damage in animals with high-dose feeding. It's noted to be an irritant to the skin, eyes, and respiratory tract, with potential to cause skin sensitization, though the rate of skin sensitization in humans is low. Triethanolamine has low acute toxicity, with median oral LD50 values of 4,190-11,260 mg/kg in rats and 5,300-8,000 mg/kg in guinea pigs, and a median dermal LD50 greater than 2,000 mg/kg in rabbits. Triethanolamine is not carcinogenic, developmental toxicant, or toxic to the reproductive system. However, chronic exposure may lead to liver and kidney damage.

Diethanolamine

Diethanolamine is a chemical found in various consumer products like shampoos, cosmetics, and pharmaceuticals. Acute exposure in humans can result in irritation of the nose, throat, and skin. However, no detailed data is available on its chronic, reproductive, developmental or carcinogenic effects on humans. Studies on animals reveal that acute oral exposure can influence the liver, blood, kidney, and central nervous system, while dermal exposure has been connected with an increased incidence of liver and kidney tumors in mice. Production of first-degree burns, skin irritation, occupational asthma, kidney, and liver injury risk, and potential skin sensitization are some other adverse effects associated with diethanolamine.

Phenoxyethanol

2-Phenoxyethanol is a hazardous substance toxic by all routes of exposure, and is used widely in products like cosmetics, soaps, and inks, among others. The effects of exposure to this faintly aromatic, colorless, oily liquid can include eye irritation, headaches, tremors, and CNS depression. It's crucial to rinse exposed eyes with tepid water for at least 15 minutes and to wash exposed skin thoroughly with soap and water in case of contact. The substance requires preheating before ignition can occur, and if involved in a fire, gentle water spray can extinguish the fire by inducing frothing.

Methylisothiazolinone

Methylisothiazolinone can reportedly cause allergic contact dermatitis in workers who interact with products containing it. This substance is recognized as a contact allergen for consumers using cosmetics that include it. It can cause skin burns and sensitization, and inhaling it may lead to corrosive injuries in the upper respiratory tract and lungs. Ingesting this substance is harmful, and inhalation is toxic. This preservative is linked to the category of isothiazolinones.

Sources: 
Isopropyl Alcohol

Isopropyl alcohol has been shown to cause narcosis in animals during acute studies, as cited by ACGIH. However, according to research by Zimmerman, it is not hepatotoxic in either experimental animal studies or in human exposures. It's known to be a skin, eye, and respiratory tract irritant, and if inhaled in high concentrations, it can cause CNS depression, as indicated by the ICSC.

Octinoxate

Octinoxate, commonly found in various cosmetic and personal care products such as hair color products, sunscreen, lipstick, and skin creams, is an endocrine disruptor that mimics estrogen and can affect thyroid function. It has been detected in human urine, blood, and breast milk, indicating systemic exposure. Octinoxate's potential health concerns include its impact on cell proliferation in response to estrogen exposure, disruptions in thyroid hormones, alterations in reproductive systems, and adverse effects on the development of male and female fetuses, as well as their offspring.

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About The Author

Camille May

Hey, I’m Camille, co-creator of Welpr and your clean living guide. After selling my last company in the health food space, I went non-toxic to heal an autoimmune condition. It did wonders for my health, but navigating which products to buy wasn’t easy. We created Welpr to make that journey feel a little bit easier. When I’m not working on Welpr, you can find me at the farmers market or unwinding in the sauna, always in bed at 9pm with a good book. I live in my hometown of Austin, TX with my pit bull, Romeo.