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research Integument pattern formation involves genetic and epigenetic controls: feather arrays simulated by digital hormone models.

112 citations , January 2004 in “The International journal of developmental biology”

This study found that feather patterning is primarily self-organizing and dynamic, relying on both genetic and epigenetic controls, with implications for similar processes like fingerprints and pigmentation.

research Endocrine controls of primary adult human stem cell biology: Thyroid hormones stimulate keratin 15 expression, apoptosis, and differentiation in human hair follicle epithelial stem cells in situ and in vitro

42 citations , July 2010 in “European Journal of Cell Biology”

This study found that thyroid hormones T3 and T4 enhance keratin 15 promoter activity and stimulate CD200 expression in epithelial stem cells from human scalp hair follicles, affecting their growth and differentiation.

research THE CONTROL OF SOME HORMONES RELATING TO CUTANEOUS AGING: MECHANISMS, MANIFESTATIONS, AND MANAGEMENT

February 2026 in “Tạp chí Sức khỏe và Lão hóa”

This review highlights current evidence showing that hormonal changes significantly influence skin aging, with estrogen decline during menopause having a major impact on women's skin health, while testosterone decreases contribute to aging in men.

Assessment of Androgenic Hormones and Other Risk Factors in Egyptian Males With Early Onset Androgenetic Alopecia: A Case Control Study

research Assessment of androgenic hormones and other risk factors in Egyptian males with early onset androgenetic alopecia: a case control study

March 2025 in “Archives of Dermatological Research”

Early-onset hair loss in Egyptian males is linked to genetics, hormones, and lifestyle factors like smoking and diet.

research Corrigendum to “Endocrine controls of primary adult human stem cell biology: Thyroid hormones stimulate keratin 15 expression, apoptosis, and differentiation in human hair follicle epithelial stem cells in situ and in vitro” [Eur. J. Cell Biol. (2010) 769–777]

1 citations , November 2012 in “European Journal of Cell Biology”

The authors clarified data overlap and corrected a figure error, apologizing for any confusion.

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Community Join

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community Claim: Insulin resistance increases the enzyme that creates DHT and affects the liver's ability to control hormones

in Research/Science 4 upvotes 11 months ago

Insulin resistance may increase DHT production, contributing to hair loss, and addressing it through diet, nutrients, and natural DHT blockers like saw palmetto and pumpkin seed oil could help reverse hair loss. Some users prefer medications like finasteride for more effective results.

community Minoxidil: How It Changes the Scalp Hormone Environment

78 upvotes 6 months ago

Minoxidil increases blood supply to the scalp, strengthening dormant follicles and extending the growth phase, but may increase scalp activity that can be countered with DHT blockers. Women experiencing side effects from finasteride or dutasteride for hair loss might consider alternatives like estrogen, especially if on birth control.

community Feminizing Hormons wet through the roof with Finasterid

29 upvotes 1 month ago

A user experienced increased estrogen levels after 11 months on finasteride, leading to concerns about feminizing effects. They plan to reduce the finasteride dosage and consider using an aromatase inhibitor to manage estrogen levels.

community Hormone Management Advice - Aromatase Inhibitors , SHBG Blockers

in Finasteride/Dutasteride 5 upvotes 1 year ago

The user plans to switch from minoxidil to finasteride or dutasteride for hair loss, while managing hormones with aromatase inhibitors and SHBG blockers. They seek advice on the best options for these treatments, considering past side effects and future therapies.

community Why is Finasteride seen as “scary” for men, but hormonal birth control is totally normalized for women?

in Finasteride/Dutasteride 757 upvotes 1 year ago

Finasteride is seen as risky for men due to side effects like erectile dysfunction, while hormonal birth control for women is normalized despite its side effects. The discussion points out a double standard influenced by societal and gender norms.

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Learn

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learn Melatonin

hormone commonly taken for sleep aid has some topical benefits for hair

learn Alfatradiol

Alfatradiol: What does a form of estrogen have to do with hair loss in men? Alfatradiol (17α-estradiol) is a prescription topical hormone, licensed for androgenetic alopecia in Germany but not FDA-approved. The controlled trial evidence is in women, where it produced stabilisation rather than regrowth and was outperformed by minoxidil; no comparable placebo-controlled trial in men appears to have been published.

learn sh-Polypeptide-7

learn Follistatin

glycoprotein that inhibits TGF-β and promotes hair growth by antagonizing activin

learn Overview

learn Stem Cell Factor

learn Centella

Sensitive to hormones? A centella scalp mask may help ease hidden inflamm Centella asiatica has anti-inflammatory and wound-healing effects in animal and cell studies, but no published research has tested a centella scalp mask on the human scalp, in hormonal contexts or otherwise, and no community reports were found of one being used this way.

learn Estradiol

Why is Estradiol used to treat hair loss in women and transgender people undergoing hormone therapy? Estradiol helps treat hair loss by balancing hormones and supporting hair follicle health.

learn procapil

Want to stop hormonal hair loss without touching your hormone levels? Procapil could block the enzyme doing the damage. Procapil's supplier describes it as inhibiting 5-alpha reductase at the scalp without changing hormone levels, but the published support is cell and animal work plus one small human study of a caffeine-plus-Procapil formula. It is a cosmetic ingredient, not an approved hair-loss treatment, and no trial has compared it with finasteride or minoxidil.

learn Clascoterone

Can I use clascoterone if I'm undergoing gender-affirming hormone therapy? No published clinical trial has tested clascoterone in people on gender-affirming hormone therapy, so its safety in that group is unknown. The FDA label reports low systemic exposure and no described effect on blood testosterone, but it also records HPA-axis suppression and raised potassium in a small minority of subjects.

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