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Best Non-Toxic Lash Serum in 2025
Updated:
Aug 28, 2025
Written by Camille May
Cofounder & Product Curator
+ 1 more
Medically reviewed by Olushola Awoyemi
PhD Environmental Toxicology
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What we look for:
- Simple formulas with minimal, non-irritating preservatives
- No parabens, PEGs, phthalates, sulfates, BHA/BHT, formaldehyde or formaldehyde-releasing ingredients, or undisclosed synthetic fragrance (unless certified safe)
- EU-compliant brands and third-party certifications when available
- Transparent sourcing, ingredients, and manufacturing practices
Find Non-Toxic Lash Serum
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All Natural Cold Pressed Castor Oil Eyelash Growth Serum - Live Fraiche
Welpr Rating
4.8
/5
Certifications
Third-party certifications are key indicators of a product's safety, ethics, and environmental impact. Click the icon to verify the certification.
Highlights
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
User satisfaction is calculated using online reviews and a Bayesian average across all personal care and cosmetic products on Welpr.
Est. Price
$13.99
Video Review
Product Details
- Promotes growth of longer, thicker lashes and fuller eyebrows naturally.
- Made from 100% natural USDA certified organic castor oil, free from chemicals and toxins.
- Convenient dual-ended wand design ensures mess-free, precise application.
- Safe for all skin types due to its gentle, natural composition.
- Perfect for first-time users looking for an easy eyelash and eyebrow treatment.
Pros & Cons
Pros
- Promotes noticeable growth and thickness for both lashes and eyebrows.
- Gentle on the skin, with no irritation for most users.
- Design includes separate tools for easy application on lashes and brows.
- Offers a natural alternative to chemical-based lash serums.
Cons
- Some users may experience minor leaks which can be messy.
- A few individuals with sensitive skin may notice mild irritation.
Ingredients
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: 100% USDA Organic Cold Pressed Castor Oil
Eyelash + Eyebrow Growth Serum - Pretty Farm Girl
Welpr Rating
4.8
/5
Certifications
Highlights
User Satisfaction
Est. Price
$24.99
Product Details
- Promotes growth of longer, thicker lashes and fuller brows with regular use.
- Infused with natural oils and botanicals to nourish hair follicles and encourage healthy growth.
- Safe for daily use on sensitive skin and around the eye area, free from harsh chemicals.
- Comes with a convenient applicator brush for precise and mess-free application.
- Crafted with organic ingredients and never tested on animals, aligning with sustainable skincare values.
Pros & Cons
Pros
- Natural formula with a pleasant scent that users enjoy.
- Visible improvements in lash and brow length reported within weeks of use.
- Gentle on sensitive areas, suitable for delicate lash and brow skin.
- Attractive packaging adds to a positive user experience.
Cons
- Some users need consistent, longer-term use before seeing noticeable results.
Ingredients
Ingredients: Ricinus Communis (Castor) Seed Oil*, Helianthus Annuus (Sunflower) Seed Oil*, Tocopherol, Polyglyceryl-3 Diisostearate, Carthamus Tinctorius (Safflower) Flower Extract, Hibiscus Sabdariffa (Hibiscus) Flower Extract*, Aloe Barbadensis (Aloe Vera) Leaf Extract*, Equisetum Arvense (Horsetail) Herb Extract*, Althaea Officinalis (Marshmallow) Root Extract*, Urtica Dioica (Nettle) Leaf Extract*, Rosmarinus Officinalis (Rosemary) Leaf Extract*, Rosmarinus Officinalis (Rosemary) Oil*Organic
Natural Lash Growth Serum - Elina Organics
Welpr Rating
4.75
/5
Certifications
Third-party certifications are key indicators of a product's safety, ethics, and environmental impact. Click the icon to verify the certification.
Highlights
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
User satisfaction is calculated using online reviews and a Bayesian average across all personal care and cosmetic products on Welpr.
Est. Price
$38.00
Product Details
- Stimulates lash and brow growth by enhancing keratin production.
- Nourishes follicles with botanical extracts to reduce breakage.
- Safe for sensitive eyes, free from parabens, oils, and synthetic additives.
- Made with certified organic and vegan ingredients, ensuring cruelty-free use.
- Easy to apply twice daily for best results.
Pros & Cons
Pros
- Contains natural and organic ingredients promoting hair growth.
- Gentle formula with no irritation, suitable for sensitive eyes.
- Non-toxic and fragrance-free for health-conscious users.
- Convenient fine-tipped applicator for precise use.
- Light, oil-free formula absorbs quickly.
Cons
- Some users may find the container too small for the price.
- Results can vary, with some users needing more time to see changes.
Ingredients
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: Vegetable Glycerin, Purified Water, Myristoyl Pentapeptide 17
Eyelash Boost Serum - DIME Beauty
Welpr Rating
4.75
/5
Certifications
Third-party certifications are key indicators of a product's safety, ethics, and environmental impact. Click the icon to verify the certification.
Highlights
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
User satisfaction is calculated using online reviews and a Bayesian average across all personal care and cosmetic products on Welpr.
Est. Price
$48.00
Product Details
- Promotes fuller, longer lashes by nourishing hair follicles for visible results.
- Strengthens and restores hair with a blend of vitamins and proteins.
- Made with safe, non-toxic ingredients for effective eyelash and brow enhancement.
- Formulated to be vegan and cruelty-free, with clean, gentle ingredients.
- Designed to be easy to apply daily for consistent lash growth and maintenance.
Pros & Cons
Pros
- Promotes noticeable lash growth and thickness for fuller lashes.
- Contains clean, non-toxic ingredients, ideal for sensitive eyes.
- Easy to apply with no burning or irritation reported by most users.
- Many users saw improvements in lash volume and strength.
- Suitable alternative for those avoiding harsh chemicals during pregnancy.
Cons
- Some users may not notice results as quickly or at all, depending on individual lash conditions.
- A small number of users experienced eye irritation or lash fall-out.
Ingredients
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, Glycerin, Amino Acids (Sodium Pca, Sodium Lactate, Arginine, Aspartic Acid, Pca, Glycine, Alanine, Serine, Valine, Proline, Threonine, Isoleucine, Histidine, Phenylalanine), Hyaluronic Acid, Panthenol, Aloe Barbadensis (Aloe Vera), Niacinamide, Portulaca Oleracea (Purslane) Extract, Terminalia Chebula (Chebulic) Fruit Extract, Pyrus Malus (Apple) Fruit Extract, Tocopherol, Phenoxyethanol, Hexanediol, Ethylhexylglycerin, Biotinoyl Tripeptide-1, Myristoyl Pentapeptide-4
Lash and Brow Serum - Agent Nateur
Welpr Rating
4.75
/5
Certifications
Third-party certifications are key indicators of a product's safety, ethics, and environmental impact. Click the icon to verify the certification.
Highlights
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
User satisfaction is calculated using online reviews and a Bayesian average across all personal care and cosmetic products on Welpr.
Est. Price
$116.00
Product Details
- Strengthens and conditions eyelashes and eyebrows for improved flexibility, moisture, and shine.
- Enhances the appearance of dense and full lashes and brows without dark marks or circles.
- Infused with hibiscus to support longer, thicker-looking eyelashes and brows.
- Perfect for those with brittle, short, or sparse lashes and brows who want healthier, vibrant results.
- Made with organic, natural, non-GMO, cruelty-free, and non-toxic ingredients.
Pros & Cons
Pros
- Promotes noticeable lash fullness and smoother eyebrow hair for many users.
- Supports a natural, minimal makeup routine by reducing the need for mascara and brow gel.
- Some users see early signs of new lash growth with continued use.
- Formulated with clean, natural ingredients, appealing to health-conscious buyers.
Cons
- Application brush may not reach lash line easily, which can affect user experience.
- Requires twice daily use, which may be less convenient for some compared to once-daily serums.
- Some users report no visible growth results even after 5 to 6 weeks of consistent use.
Ingredients
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: Hibiscus Sabdariffa Seed, Aloe Barbadensis Leaf Juice, Emblica Officinalis (Amla) Fruit Extract, Vegetable Glycerine, Olus Oryza Sativa, Eclipta Prostrata Extract, Aqua, Sodium Metabisulfite, Glycine, Larix Europaea Wood Extract, Zinc Chloride, Camellia Sinensis Leaf Extract, Butylene Glycol, Dextran, Panthenyl Ethyl Ether, Milk Protein, Lactose, Inositol, Acetyl Cysteine, Acetyl Methionine, Sodium Citrate, Citric Acid, Tocopherol, Cucurbita Pepo Seed, Kalahari Melon Seed, Rosa Damascena, Santalum Album, Cucumber Extract, Dehydroacetic Acid, Benzyl Alcohol
GRO Lash Serum - Vegamour
Welpr Rating
4.75
/5
Certifications
Third-party certifications are key indicators of a product's safety, ethics, and environmental impact. Click the icon to verify the certification.
Highlights
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
User satisfaction is calculated using online reviews and a Bayesian average across all personal care and cosmetic products on Welpr.
Est. Price
$68.00
Product Details
- Free from silicones, sulfates, phthalates, and parabens, ensuring a non-toxic application.
- Formulated to support fuller and thicker-looking lashes in as soon as 30 days.
- Easy to incorporate into morning or evening routines for effective lash enhancement.
Pros & Cons
Pros
- Many users report impressive eyelash growth and fullness.
- The formula is clean and gentle, avoiding irritation for most users.
- Effective for those looking to strengthen existing lashes.
Cons
- Some users did not experience any noticeable results.
- A small number of users experienced adverse reactions like eye swelling.
Ingredients
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, Pentylene Glycol (Plant Based), Propylene Glycol (Plant Based), Glycerin, Butylene Glycol (Plant Based), Magnolia Officinalis Bark Extract, Gellan Gum, Xantham Gum, Trifolium Pratense (Clover) Sprout Extract, Vigna Radiata Seed Extract, Sodium Benzoate, Potassium Sorbate, Dextran, Acetyl Tetrapeptide-3, Trifolium Pratense (Clover) Flower Extract, Citric Acid
Grow Potion Fluffy Lash + Brow Boosting Serum - Kosas
Welpr Rating
4.65
/5
Certifications
Third-party certifications are key indicators of a product's safety, ethics, and environmental impact. Click the icon to verify the certification.
Highlights
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
User satisfaction is calculated using online reviews and a Bayesian average across all personal care and cosmetic products on Welpr.
Est. Price
$48.00
Product Details
- Accelerates the appearance of fuller, feathery brows and longer, thicker lashes.
- Minimizes breakage and loss, leaving brows and lashes stronger and healthy looking.
- Powered by a trio of peptides, vegan keratin, pro-vitamin B5, and hyaluronic acid.
- Clinically proven results in only 12 weeks, with 97% seeing improvement in brow length and lash volume.
- Contains 100% clean ingredients for sensitive skin, free of harmful chemicals.
Pros & Cons
Pros
- Promotes significantly thicker and longer lashes.
- Useful for achieving fuller eyebrows.
- Application is generally easy with a soft, angled brush.
- Non-irritating formulation, even for sensitive eyes.
- Multi-use for both lashes and eyebrows.
Cons
- Some users may not notice a difference in lash growth.
- A few users find application on lashes challenging.
Ingredients
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), Pullulan, Propanediol, Glycerin, Butylene Glycol, Sorbitol, Pentylene Glycol, Xanthan Gum, Sodium Hyaluronate, Panthenol, Soy Amino Acids, Wheat Amino Acids, Arginine Hcl, Serine, Threonine, Trehalose, Acetyl Tetrapeptide-3, Biotinoyl Tripeptide-1, Myristoyl Pentapeptide-17, Trifolium Pratense (Clover) Flower Extract, Citric Acid, Dextran, Sodium Gluconate, Acacia Senegal Gum, Phenethyl Alcohol, Potassium Sorbate, Ethylhexylglycerin, Benzyl Alcohol, Benzoic Acid
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
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.
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).
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 Lash Serum
Chemical Name
Why it’s harmful
Boric Acid
Boric acid, in the form of white crystals or powder, acts as a cosmetic preservative due to its astringent properties, which deter bacteria formation and contamination in skincare and personal care products. The Expert Panel for Cosmetic Ingredient Safety has assessed the safety of sodium borate and boric acid, concluding that concentrations up to 5% are safe as cosmetic ingredients, but they should not be used on infant or injured skin.
1,4-Dioxane
1,4-Dioxane is a clear, water-soluble liquid that is primarily used as a solvent in chemical manufacturing and laboratory reagents. Other uses leverage its solvent properties, including cosmetics, detergents, and shampoos. However, manufacturers generally reduce 1,4-Dioxane to low levels in these products due to its potential health risks. Acute exposure can result in symptoms such as vertigo, drowsiness, and irritation of the eyes, nose, throat, and skin. Chronic exposure may lead to liver and kidney damage, and the substance is classified as a probable human carcinogen by the EPA. Notably, severe kidney and liver damage, CNS effects, and even death have been recorded after heavy or prolonged exposure.
Sources:
What Is 1,4-Dioxane in Laundry and Cleaning Products?, Effect of ethoxylation and lauryl alcohol on the self-assembly of sodium laurylsulfate: Significant structural and rheological transformation, Final Risk Evaluation for 1,4-Dioxane, Ongoing and Completed Chemical Risk Evaluations under TSCA, Preliminary Information on Manufacturing, Processing, Distribution, Use, and Disposal, TOXICOLOGICAL REVIEW OF 1,4-DIOXANE, 15th Report on Carcinogens, 1,4-Dioxane, Determination of residual 1,4-dioxane in surfactants and cleaning agents using headspace single-drop microextraction followed by gas chromatography–flame ionization detection, 1,4-Dioxane in Cosmetics: A Manufacturing Byproduct, An integrated assessment of the 1,4-dioxane cancer mode of action and threshold response in rodents, Campaign for Safe Cosmetics: 1,4-DIOXANE, Product Profile: Hand Sanitizer, Occurrence of 1,4-dioxane in cosmetic raw materials and finished cosmetic products, Chemical Profile: 1,4-dioxane
Isopropyl Cloprostenate
Isopropyl Cloprostenate, a synthetic prostaglandin derivative from the pharmaceutical industry, stimulates hair growth by acting as an artificial hair growth hormone. While effective for eyelash growth, it has potential side effects, making it a controversial ingredient. Isopropyl cloprostenate can lead to serious side effects, including eye irritation, inflammation, redness, cysts, and macular edema, due to its nature as a prostaglandin analog.
Authors
Camille May, Product Curator
Olushola M. Awoyemi, Medical Reviewer
