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research Genome-wide association meta-analysis of individuals of European ancestry identifies new loci explaining a substantial fraction of hair color variation and heritability

94 citations , April 2018 in “Nature Genetics”

This study identified more than 100 genetic loci associated with hair color variation in Europeans, explaining a significant portion of the trait's heritability and advancing understanding of hair pigmentation.

research Towards Best Practice in Hair Metabolomic Studies: Systematic Investigation on the Impact of Hair Length and Color

10 citations , September 2020 in “Metabolites”

This study found that metabolite levels in hair samples differ significantly by hair color and segment, leading to recommendations for best practices in hair metabolomic studies.

research Effects of Aging on Hair Color, Melanosomes, and Melanin Composition in Japanese Males and Their Sex Differences

7 citations , November 2022 in “International Journal of Molecular Sciences”

This study found that both Japanese male and female hair darkens with age, with significant sex differences in melanin composition and melanosome morphology influencing hair color.

research Hair color digitization through imaging and deep inverse graphics

1 citations , January 2022 in “Electronic Imaging”

This study introduces a novel method for digitizing hair color that accurately captures and renders the color appearance of physical hair samples in synthetic images.

research Coat color and other factors influencing hair cortisol concentration in domestic cats

October 2025 in “Journal of Veterinary Diagnostic Investigation”

This study found that in domestic cats, black hair contained significantly higher cortisol concentrations than white hair, whereas ginger hair showed no significant difference compared to white hair. Additionally, a positive correlation was reported between hair cortisol levels and behavioral issues mentioned by cat owners.

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Learn

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learn Scalp Micropigmentation

Can I still color or style my hair after scalp micropigmentation? You can color and style your hair after scalp micropigmentation once fully healed.
Does scalp micropigmentation work on all skin tones and hair colors? Scalp micropigmentation can be customized for various skin tones and hair colors.
What happens if my hair turns gray after scalp micropigmentation? Gray hair can blend well with scalp micropigmentation, and touch-ups can adjust pigment as needed.

learn Hair Transplant

Can I dye my hair after a hair transplant? Wait 4-6 weeks before dyeing your hair after a hair transplant.
When can I cut or style my hair after a hair transplant? You can cut or style your hair about 1 month after a hair transplant.

learn Osteopontin

signaling protein that, when suppressed, may grow hair by reducing inflammation and stem cell loss

learn Tretinoin

the gold standard retinoid in dermatology that's also helpful for hair regrowth alongside Minoxidil

learn GHK-Cu

a copper peptide showing promise in both regrowth and reversing gray hair

learn Overview

learn Stem Cell Factor

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Community Join

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community I regret not starting Fin sooner. Even the color of my hair got so much stronger. Crazy!

in Progress Pictures 641 upvotes 1 year ago

The conversation is about using finasteride (Fin) for hair loss, with the original poster expressing regret for not starting it sooner due to improved hair color and strength. Users discuss their experiences with finasteride, dutasteride, and minoxidil, noting varying results and side effects.

community due to medication, age, over use of color and heat, my hair began to fall out and break. I shaved my head (35F) and I’m horrified at myself now

in Female 46 upvotes 1 year ago

A woman experienced significant hair loss due to medication, hair coloring, and heat damage, leading her to shave her head and feel distressed. She is considering using wigs and possibly oral minoxidil to manage the situation while her hair regrows.

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

5 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 I am 20 years old male and my hair is prematurely graying since I first notice bald spots. Any chances of it reversing back to my natural hair color?

6 years ago

A 20-year-old male experienced bald spots and used minoxidil, which led to hair regrowth but also premature graying. He seeks advice on reversing graying through diet or supplements like catalase, while another user suggests vitamin D3 and sesame for hair color.

community Mystery hair loss and colour change

5 upvotes 6 years ago

The user is experiencing severe hair loss and color change despite low testosterone levels and healthy lifestyle changes. They have tried ketoconazole shampoo and consulted a dermatologist, who found no scalp issues but suggested using Toppik for coverage.

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Clinics

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