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Best Non-Toxic Hair Dyes

We vetted hair dyes against the Welpr Standard and here are our top picks.

Camille May

Cofounder & Product Curator

Olushola M. Awoyemi

Medical Reviewer, PhD

Here's what we look for:

Formulas made with natural or synthetic ingredients that meet our standard
Free from parabens, PEGs, phthalates, harsh sulfates, BHA/BHT, artificial dyes, formaldehyde and formaldehyde-releasing ingredients, and undisclosed fragrance
Minimal, well-chosen preservatives
Trusted third-party certifications when available
Transparent sourcing, ingredients, and manufacturing practices

Best Non-Toxic Hair Dyes

On Welpr, terms like "non-toxic," "safer," "cleaner," "healthier," and "vetted" are editorial labels based on our own standard for product assessment. They are not guarantees, certifications, or medical claims. Learn more.

Top Pick

oVertone

Color Depositing Treatment Hair Mask

9.2

Performance score

Where to buy

Amazon
See price

Water/Aqua/Eau
Cetearyl Alcohol (From Mixed Plants)
Cetyl Alcohol (From Vegetables)
Stearyl Alcohol (From Vegetables)
Glycerin (From Vegetables)
Behentrimonium Chloride
Cocos Nucifera (Coconut) Oil
Butyrospermum Parkii (Organic Shea) Butter
Simmondsia Chinensis (Organic Jojoba) Seed Oil
Persea Gratissima (Avocado) Oil
Oenothera Biennis (Evening Primrose) Oil
Sesamum Indicum (Sesame) Seed Oil
Linum Usitatissimum (Organic Linseed) Oil
Olea Europaea (Olive) Fruit Oil
Amodimethicone
Guar Hydroxypropyltrimonium Chloride (From Guar Beans)
Polysorbate 60 (From Vegetables)
Basic Blue 99
Basic Brown 16
Basic Red 76
Basic Yellow 57
Basic Red 46
Basic Violet 1
Basic Yellow 40
Basic Orange 2
Basic Blue 9
Basic Green 4
Basic Violet 2
Citric Acid
Benzyl Alcohol
Dehydroacetic Acid
Rosmarinus Officinalis (Rosemary) Leaf Oil
Mentha Viridis (Spearmint) Leaf Oil

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Budget Pick

Rainbow Research

Henna Hair Color & Conditioner

Free From: Cruelty Free
Highlights: Vegan, Cruelty-free, Henna, Powder

7.8

Performance score

Where to buy

Amazon
See price

Pros

Covers gray hair well when left on long enough, with color lasting at least six weeks for some people.
Leaves hair noticeably softer and healthier-feeling after repeated use.
Washes off skin, towels, and porcelain easily compared to conventional dyes, without staining the scalp or ears.
Color comes out rich and vibrant; the light brown shade reads as warm golden or reddish rather than a flat brown.

Cons

Color results are inconsistent: several people found it didn't take at all, especially on roots, even following the directions.
The grainy powder residue is hard to rinse out fully and can leave sandy particles in the hair after washing.
Requires significant time and technique (heat cap, vinegar, 2-4 hour processing) to get good results; short application times can produce uneven or overly bright color.
The earthy smell is strong and off-putting to some.

Henna works differently from conventional hair dye: instead of penetrating the hair shaft with chemicals, it coats the outside of each strand with plant-based color. The result blends with your natural shade rather than replacing it.
Comes as a dry powder you mix with boiling water (or coffee/tea for grey coverage) into a paste, then paint onto sectioned hair. It's a hands-on process that takes 45 to 75 minutes of processing time depending on the shade.
Color builds and improves with repeated use. Each application adds more body and texture, and the cuticle-sealing action increases shine over time.
Among non-toxic hair dyes, henna is one of the few that doubles as a conditioner rather than stripping or drying hair. The tradeoff: it can't lighten hair, only deposit color at or darker than your natural shade.
Available in over a dozen shades, from blonde to black, made by blending different plant powders. Color fades gradually over four to six weeks rather than leaving a harsh root line.
Rainbow Research has been making these in small batches since 1976. The formulas are entirely plant powder with no metallic salts, which distinguishes them from some other henna brands that add metal-based compounds to speed processing.

Light Mountain

Henna Hair Color & Conditioner

Free From: Cruelty Free
Certified: Fair For Life, Leaping Bunny
Highlights: Vegan, Cruelty-free, Henna, Powder, Ammonia-free

8.7

Performance score

Where to buy

Amazon
See price

Pros

Color lasts for months without noticeable fading; most reapplication is just for root touch-ups.
Leaves hair noticeably shinier and healthier-feeling compared to chemical dyes.
Color shifts beautifully between indoor and outdoor light, giving a rich, dimensional result.
One box goes a long way; people with long or thin hair report having plenty left over for a second application.
Mixes easily with common kitchen additions like coffee, yogurt, or lemon juice to customize the result.

Cons

Application is messier than standard dyes, and the included gloves and hair cap aren't secure enough to rely on.
Color bleeds onto pillowcases and towels for about a week after application.
The final shade can oxidize darker than expected over the first few weeks after dyeing.

Pure henna powder that coats each hair strand with a translucent layer of color rather than penetrating it. Unlike conventional dyes that use chemicals to strip the hair shaft so color can absorb, henna sits on top and builds color over your existing shade.
Because it works by coating rather than stripping, it won't lighten your hair. The color you get depends on what you're starting with, so a strand test is essential before committing to a full application.
You mix the powder with boiling distilled water into a gritty, creamy paste, then apply it by hand or with a brush. The kit includes gloves, a cap, and illustrated instructions. Expect to reapply roughly every 9 to 12 weeks.
For hair that's more than about 10% gray, white, or platinum blonde, Light Mountain recommends their separate two-step "Color the Gray" line instead. This single-step formula is designed for hair that already has pigment to build on.
One of the longer-running henna hair color brands in the natural products space, originally launched in the 1970s under a different name. Among non-toxic hair dyes, it's notable for using a single botanical ingredient rather than blending in supplementary plant extracts or stabilizers.

The Henna Guys

Henna Hair & Beard Dye

Free From: Cruelty Free, Fragrance Free
Highlights: Vegan, Cruelty-free, Money-back guarantee, Henna-based

7.7

Performance score

Where to buy

Amazon
See price

Pros

Covers gray hair effectively, even on darker hair colors.
Noticeably improves hair condition; multiple people report softer, healthier hair after use, especially compared to chemical dyes.
Color is vibrant, long-lasting, and doesn't fade quickly between applications.
Leftover mixed henna can be frozen and reused, so nothing goes to waste.
Comes with gloves and a bonnet for application.

Cons

Requires significant prep and processing time: the dye needs hours to release before application, then 2-6 hours on the hair for best results.
Final color can differ noticeably from the shade shown on the package, especially on previously dyed or darker hair.
Color bleeds onto towels and pillowcases when hair is wet for up to a week after application.
Can form small lumps when mixed with hot water, making it harder to get a smooth consistency.

Comes as a dry powder you mix with hot water into a thick paste, then apply by hand (gloves included) to your beard. It needs about an hour on the hair, and the color takes up to 24 hours to fully oxidize and settle, so expect a greenish tint initially before it shifts to brown.
The powder blend uses henna and indigo together to produce brown tones. Henna alone dyes red; the indigo counteracts that to push the color toward chocolate brown. The ratio between the two is what determines the shade.
One packet can cover an average beard roughly five times, or you can use the same packet to dye your head hair, eyebrows, and beard all in one session.
Works best on light to medium hair. It can darken blonde or light brown beards and blend gray, but it cannot lighten already-dark hair.
Among non-toxic beard dyes, plant-based powder formats like this require more time and effort than conventional gel dyes. The tradeoff is that the formula contains no synthetic colorants or preservatives, and the mixed paste expires quickly precisely because of that.
The powder is triple-sifted for a smoother, less clumpy paste and vacuum-sealed to preserve freshness. Made in small batches rather than bulk production runs.

Radico

Color Me Organic Long Lasting Hair Color

Free From: BPA Free, BPF Free, BPS Free, Dye Free, Formaldehyde Free, Heavy Metal Free, Paraben Free, PFAS Free, Phthalate Free, Sulfate Free
Certified: Made Safe, USDA Organic
Highlights: Vegan, Fragrance-free, Henna, Powder, Ammonia-free

7.0

Performance score

Where to buy

Amazon
See price

Pros

Covers gray and white hairs well when applied generously and left on long enough.
Adds noticeable shine to hair, with several people comparing it to healthier-looking, younger hair.
With repeated use over time, hair feels thicker and looks restored, especially if previously damaged by chemical dyes.

Cons

Color results are unpredictable; multiple people got unexpected red, purple, or green tones depending on their base hair color and variant.
Requires very thick application and long processing times (some left it on 8+ hours) to get decent coverage.
Strong spinach-like smell that lingers for a day or two after application.
Works poorly on hair that has been previously chemically dyed, often requiring multiple applications before the color takes.

Henna-based powder hair color that you mix with warm water into a paste and brush on at home. It coats and penetrates the hair shaft using plant pigments rather than synthetic dyes, so there's no chemical developer or peroxide involved.
Color typically lasts two to four weeks, with results getting deeper over the first few days as the plant pigments oxidize. Subsequent applications tend to last longer than the first.
Works best for covering gray when you're up to about 40% gray. If your hair is mostly gray, the initial result can skew orange or purple, which requires a follow-up application of pure indigo or pure henna to correct.
Each box includes enough powder for one to three applications depending on hair length, plus gloves, a brush, and a shower cap. The paste needs to sit on hair for at least an hour (up to three for deeper color).
Among non-toxic hair dyes, this one is entirely plant-based with no synthetic pigments or chemical processing agents. The herbs in the formula also condition the hair, so it can feel thicker and more moisturized after use rather than drier.
Radico, based in India, has been focused exclusively on natural and organic hair color since the early '90s and introduced what they say was the first certified organic hair color line in 2012.

How to Swap to Non-Toxic hair dyes:

Here's how to swap to non-toxic hair dyes:

What to know about hair dye

Hair dye is a product that sits on your scalp and hair for extended periods during application, and your scalp is one of the most absorbent areas of skin. Many conventional hair dyes rely on synthetic fragrances, harsh preservatives, and pigments that may contain heavy metals or other unwanted additives.

Because hair dye has prolonged contact with your scalp and is often used near your face, the formulation deserves a close look.
If you dye your hair frequently, paying attention to what's in your formula is especially worthwhile.

Review what you already use

Check your current hair dye by scanning it with the Welpr Personal Care and Cosmetic Scanner. This will flag ingredients worth knowing about so you can see how your product stacks up.

Look for "fragrance" or "parfum" on the ingredient list — these are catch-all terms that can hide dozens of undisclosed synthetic ingredients.
If you use more than one hair product during the dyeing process (developer, toner, conditioner), scan each one separately.

Use your current hair dye more safely

If you're not ready to switch yet, small changes during application can reduce what your scalp and skin absorb. Replacing a product you already bought isn't always practical, so these steps can help in the meantime.

Apply hair dye in a well-ventilated area — open a window or turn on a bathroom fan to reduce what you breathe in.
Avoid leaving dye on longer than the directions suggest, and rinse thoroughly to minimize residue on your scalp.

Choose cleaner replacements

Look for hair dyes with simple, intentional formulations. Welpr prioritizes products free from synthetic fragrance, harsh preservatives, parabens, phthalates, and formaldehyde-releasers. Safer pigments and naturally derived ingredients are a strong sign of a cleaner option.

Choose products that are fragrance-free or scented only with essential oils, and look for certifications like EWG VERIFIED™ or MADE SAFE® as a helpful starting point.
Click the button above to shop Welpr Approved hair dye.

Camille May

Cofounder & Product Curator

Camille May is the co-creator of Welpr and a guide for clean living. After selling her last company in the health food space, she went non-toxic while working to heal an autoimmune condition....

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Olushola M. Awoyemi

Medical Reviewer, PhD

Olushola M. Awoyemi (aka Shola) is a board-certified toxicologist and a research scientist with a PhD in Environmental Toxicology. Shola's long-term ambition is to be recognized as a world-renowned expert in toxicology,...

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