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Research

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research Investigation of hair dye deposition, hair color loss, and hair damage during multiple oxidative dyeing and shampooing cycles.

4 citations , August 2016 in “PubMed”

This study analyzed how oxidative hair dye leaches from pigmented and nonpigmented hair during wash cycles, finding that melanin influences the dye deposition and leaching processes.

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”

In this study, polydopamine emerged as a safe and effective alternative to traditional hair dyes like PPD for dyeing gray hair permanently, showing resistance to detergents and causing less toxicity and hair loss in mice.

Marine Biomass Derived Melanin Chitosan Composites as Natural Black Hair Colorants: Charge Reversal and Electrostatic Deposition Mechanism

research Marine-Biomass-Derived Melanin–Chitosan Composites as Natural Black Hair Colorants: Charge Reversal and Electrostatic Deposition Mechanism

June 2026 in “Organics”

This study reports the development of a natural hair-coloring system using size-controlled ink particles from cuttlefish ink combined with chitosan, achieving darker and more uniform black coloration on hair than existing plant-based natural colorants, without the need for metallic mordants.

research Dirty Dots as a Normal Trichoscopic Finding in the Elderly Scalp

6 citations , January 2016 in “JAMA Dermatology”

This article discusses the presence of dirty dots as a normal trichoscopic finding in children, noting they are not observed in adults or other age groups, and reports no new results.

research Hair dye: A trichoscopy pitfall

6 citations , March 2015 in “Journal of The American Academy of Dermatology”

This article discusses the diagnostic challenges of evaluating hair and scalp conditions in patients using hair dye, emphasizing how dyes can mimic different pathologies and lead to contact dermatitis.

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Community Join

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community Exploring Bryan Johnson's Hair Routine In Detail

64 upvotes 2 years ago

Bryan Johnson uses a custom hair loss treatment that includes topical finasteride, minoxidil, azelaic acid, diclofenac, tea tree oil, rosemary oil, ginkgo biloba, biotin, and melatonin, which have shown varying degrees of effectiveness with minimal side effects. He also undergoes PRP and laser therapy, and has tried dutasteride mesotherapy.

community A Theory on Why Microneedling Works

175 upvotes 6 years ago

Microneedling may enhance hair regrowth by transferring stem cells to dormant follicles, improving the effects of minoxidil. Users discuss using microneedling with needle lengths around 1.5mm to stimulate hair growth.

community Finasteride won’t make all your problems go away

in Finasteride/Dutasteride 323 upvotes 2 years ago

A user shared that while finasteride improved their hair, it didn't solve all their insecurities, suggesting that self-acceptance is key. Others in the conversation expressed varying opinions, with some feeling that finasteride significantly boosted their confidence and quality of life, while others acknowledged it as a solution to hair loss but not a cure-all for other personal issues.

community I just made 60x of 5mg minoxidil sugar cubes

1339 upvotes 1 year ago

A user created oral minoxidil sugar cubes due to lack of prescription access, leading to a humorous discussion about unconventional and potentially unsafe methods of using minoxidil. The conversation highlights the lengths people go to for hair growth.

community Fighting Hair loss AND Grey Hair

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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Learn

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learn Hair Transplant

Can I dye my hair after a hair transplant? Wait 4-6 weeks before dyeing your hair after a hair transplant.
Can I style or care for my transplanted beard after the hair transplant? You can style and care for your transplanted beard like natural hair after it heals.
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.
All 4 questions on Hair Transplant →

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.

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Clinics

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15
Hair Systems
The Dye Lot Hair SalonNorth Vancouver, BC · CA

Experts

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Unscored
SMP Specialist
Hairo Fallas
Newark, NJ, United States

Hairo Fallas