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GlossaryHair Dye

chemical substance used to change hair color

Hair dye, also known as hair color or hair coloring, is a chemical substance used to change the color of hair. It can be applied for cosmetic reasons, such as covering gray hair, or for fashion purposes to achieve a desired look. Hair dyes can be temporary, semi-permanent, or permanent, with the latter involving a chemical reaction that alters the hair's natural pigment.

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Clinics

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Research

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research 55 cases of allergic reactions to hair dye: a descriptive, consumer complaint‐based study

98 citations , November 2002 in “Contact Dermatitis”

Many people had severe allergic reactions to a common hair dye ingredient, causing them to seek medical care and miss work.

research Types of Hair Dye and Their Mechanisms of Action

84 citations , April 2015 in “Cosmetics”

Hair dyes vary in how long they last and how deeply they penetrate hair.

research Percutaneous penetration of hair dyes

66 citations , February 1985 in “Archives of dermatological research”

Hair dyes penetrate the scalp very minimally, less than 1%.

research Metal-Chelation-Assisted Deposition of Polydopamine on Human Hair: A Ready-to-Use Eumelanin-Based Hair Dyeing Methodology

63 citations , February 2017 in “ACS biomaterials science & engineering”

Polydopamine is a safe, effective, and permanent hair dye that turns gray hair black in one hour.

An Ultrastructural Study of Hair Fiber Damage and Restoration Following Treatment with Permanent Hair Dye

research An ultrastuctural study of hair fiber damage and restoration following treatment with permanent hair dye

40 citations , February 2002 in “International Journal of Dermatology”

Permanent hair dye damages hair but it mostly recovers after 8 weeks; using certain hair care products can help repair it.

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Community Join

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community To all my thinning homies - use hair dye!!

in Styling 51 upvotes 2 years ago

The conclusion of the conversation is that dying the hair can be an effective method for managing hair loss, particularly for those with diffuse thinning.

community 45 days on 0.5mg dut, 2.5mg oral min, a bit of hair dye and nothing else

in Is this regrowth? 16 upvotes 2 years ago

The user is sharing their experience with using 0.5mg dutasteride, 2.5mg oral minoxidil, and hair dye for 45 days. Another user encourages them to continue as it is still too early to see significant improvement.

community Please advise those who have succeeded in reversing their hair color from white to black

in Hair Systems 4 upvotes 2 years ago

A 25-year-old male seeks advice on reversing white hair to black. Suggestions include using hair dye, peptides like TB-500 and BPC-157, and finasteride for hair growth.

community Hair transplant result, hair+confidence back 👍

in Progress Pictures 295 upvotes 3 years ago

A user who got a hair transplant and gave their experience with it, including how the donor area recovered quickly and the potential risks of getting a hair transplant at a young age. Other users discussed bleaching and dyeing transplanted hair, as well as asking about the clinic where the procedure was done.

community Fighting Hair loss AND Grey Hair

in Treatment 2 upvotes 4 years ago

OP is exploring ways to stop or reverse greying hair, using NAC and considering PABA supplements. Some users suggest hair dye, black strap molasses, and copper as potential solutions.

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