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Neuroendocrinology of Human Scalp Hair Follicles: Growth Hormone-Releasing Hormone Stimulates Hair Growth and Controls a Fully Functional Intrafollicular Hypothalamic-Pituitary-Somatotropic Signaling Axis

research 562 Neuroendocrinology of human scalp hair follicles: Growth hormone-releasing hormone (GHRH) stimulates hair growth and controls a fully functional intrafollicular hypothalamic-pituitary-somatotropic (HPS) signaling axis

November 2022 in “Journal of Investigative Dermatology”

This study found that human scalp hair follicles produce neurohormones and responded to GHRH stimulation by prolonging hair growth, suggesting a functional peripheral HPS neuroendocrine signaling axis in the skin.

research Hypothalamic–Pituitary–Thyroid Axis Hormones Stimulate Mitochondrial Function and Biogenesis in Human Hair Follicles

95 citations , August 2013 in “Journal of Investigative Dermatology”

HPT axis hormones boost mitochondrial function and growth in hair follicles, potentially aiding hair health.

research The Thyroid Hormone Analogue KB2115 (Eprotirome) Prolongs Human Hair Growth (Anagen) Ex Vivo

17 citations , April 2016 in “Journal of Investigative Dermatology”

This study found that the synthetic thyroid hormone receptor modulator KB2115 significantly prolonged the growth phase of human hair follicles in culture without altering mitochondrial activity, suggesting potential as a safer hair loss treatment compared to traditional thyroid hormones.

Thyroid Hormones Directly Alter Human Hair Follicle Functions: Anagen Prolongation and Stimulation of Both Hair Matrix Keratinocyte Proliferation and Hair Pigmentation

research Thyroid Hormones Directly Alter Human Hair Follicle Functions: Anagen Prolongation and Stimulation of Both Hair Matrix Keratinocyte Proliferation and Hair Pigmentation

115 citations , August 2008 in “The Journal of Clinical Endocrinology & Metabolism”

In this study, T3 and T4 were found to directly influence human hair follicles in vitro, enhancing keratinocyte proliferation, prolonging the hair growth phase, and affecting pigmentation.

research Androgenetic alopecia: effects of oral finasteride on hormone profile, reproduction and sexual function

10 citations , February 2020 in “Endocrine”

This study found that finasteride treatment in males with androgenetic alopecia was linked to significant changes in sperm parameters and increased testosterone levels, but no sexual dysfunction was observed, and sperm parameters returned to baseline after treatment stopped.

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Community Join

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community Why does the same hormone grow your beard and destroy your hairline?

44 upvotes 4 months ago

DHT promotes beard growth but causes scalp hair loss due to inflammation and fibrosis. Treatments like finasteride and minoxidil help with hormonal signals and blood flow but don't address underlying inflammation.

community PP405: The Ultimate Hair Loss Drug for Complete Hair Growth

211 upvotes 1 year ago

PP405 is a new hair loss treatment in phase 2 trials that may promote hair growth by increasing lactate production and activating hair follicle stem cells. It could potentially replace hormone-disrupting treatments like Minoxidil and finasteride.

community 11 months progress, HRT + Fin + Min

in Progress Pictures 366 upvotes 6 months ago

A transwoman shared her 11-month progress using hormone replacement therapy (HRT), finasteride, and minoxidil, reporting significant hair regrowth and satisfaction with the results. The discussion included various perspectives on HRT, its effects on hair and sexual function, and personal experiences with similar treatments.

community What is the cause of "DHT itch"?

in Research/Science 7 upvotes 1 year ago

The conversation discusses the effects of using Tongkat ali and dioscorea to raise DHT levels, leading to increased body hair growth and an itchy scalp, without causing hair loss. The discussion also debates the role of DHT in male characteristics and its impact on sexual function, with differing opinions on its importance and effects.

community Hair loss research focused on chemistry for decades because we misunderstood the mechanics of growth.

51 upvotes 7 months ago

Hair growth relies on mechanical forces, not just chemicals, with tissue acting like a motor. Minoxidil and finasteride help, but maintaining tissue elasticity and addressing mechanical issues are essential.

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Learn

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learn Stem Cell Factor

learn Melatonin

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

learn sh-Polypeptide-7

How does sh-Polypeptide-7 help stimulate hair follicle activity or reduce scalp inflammation? sh-Polypeptide-7 is the INCI name for a lab-made form of human growth hormone (somatotropin) — not EGF, which is sh-Oligopeptide-1. Growth hormone and IGF-1 signalling is documented in hair follicle biology, but there is no published human trial of sh-Polypeptide-7 applied to the scalp for hair growth or scalp inflammation.

learn Estradiol

an estrogen promoting hair regrowth more commonly used in women

learn Cyproterone

a synthetic anti-androgen and weak progestogen that inhibits DHT binding to androgen receptor

learn Vascular Endothelial Growth Factor

How does Vascular Endothelial Growth Factor (VEGF) differ from DHT-blocking treatments for androgenic alopecia? VEGF promotes blood vessel growth, while DHT-blocking treatments reduce hormone effects on hair follicles.

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