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Research

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research Protein Kinase Cε, Which Is Linked to Ultraviolet Radiation-Induced Development of Squamous Cell Carcinomas, Stimulates Rapid Turnover of Adult Hair Follicle Stem Cells

10 citations , January 2013 in “Journal of skin cancer”

In this study, PKC ε transgenic mice exposed to ultraviolet radiation showed increased hair follicle stem cell frequency and altered gene expression compared to wild-type mice, suggesting a potential role in skin cancer susceptibility.

research Hair Strengthening Evaluation of Anisotropic Osmolite Solutions (Inositol + Arginine): Cross-Talk between Dermal Papilla Fibroblast and Keratinocytes of the Outer Root Sheath Using a µHair Follicle 3D Model

September 2018 in “Cosmetics”

This study found that anisotropic osmolyte solutions may improve hair follicle turnover and condition in both in vitro and in silico models, as well as in human volunteers with hair disorders.

research Bulge Progenitor Cells: A Promising Frontier in Hair Follicle Regeneration and Clinical Translation

September 2026 in “Stem Cell Reviews and Reports”

Bulge progenitor cells show promise for regenerating hair follicles and increasing hair density.

research Col4a2-eGFPmouse model reveals the molecular and functional dynamics of basement membrane remodelling in hair follicle morphogenesis

November 2023 in “bioRxiv (Cold Spring Harbor Laboratory)”

This study used a novel fluorescent tagging method in mice to observe collagen IV dynamics during hair follicle development, revealing that alterations in basement membrane turnover can influence epithelial progenitor cell behavior and organ morphology by affecting cell proliferation and movement.

research LB1077 Cutaneous responses to systemic iron: A potential role for epidermal turnover in mammalian iron excretion

August 2019 in “Journal of Investigative Dermatology”

This study suggests that epidermal turnover could be a regulated mechanism of iron excretion, with systemic iron levels influencing keratinocyte behavior and differentiation markers in the skin.

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Community Join

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community Minoxidil Response Bottlenecks: Why Sulfation and Transport Matter (And Where Tretinoin Fits In)

in Research 461 upvotes 1 year ago

Minoxidil's effectiveness is limited by the need for sulfation and proper transport to hair follicles, with tretinoin potentially enhancing its effects by promoting enzyme activity and keratinocyte differentiation. Tretinoin may improve minoxidil's response by boosting the expression of necessary enzymes and transporters.

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 can revive up to 7 year old dead hair

in Research/Science 188 upvotes 1 year ago

Finasteride and minoxidil can revive hair dormant for up to 7 years, with microneedling enhancing regrowth. Users report significant hair regrowth even after long periods of baldness.

community No stabilisation after 12 months on Dut - is this it?

5 upvotes 1 month ago

The conversation discusses the lack of hair regrowth and continued thinning despite using dutasteride for 12 months after finasteride. Suggestions include increasing dutasteride dosage, considering oral minoxidil, addressing scalp health, and lifestyle changes.

community Am I a suitable candidate for a hair transplant?

in Transplants 8 upvotes 1 month ago

The user is considering a hair transplant due to thinning hair but has been using dutasteride and topical minoxidil for 4 years, which has stabilized and thickened their hair. They are advised to continue with current treatments and consider other options like microneedling, as transplants may not be ideal for diffuse thinning.

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Learn

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learn Niacinamide

Does niacinamide support hair follicle nutrition? Niacinamide is a precursor of NAD+, a molecule cells use for energy. Whether it affects hair follicles in people has not been tested.

learn Scalp Micropigmentation

Will scalp micropigmentation damage my existing hair or follicles? Providers say SMP sits above the hair follicles and does not harm them. No study has tested this, and infection or scarring from any tattoo can affect the skin.

learn Redensyl

Does Redensyl regenerate follicles or only strengthen existing hair? No independent study has shown that Redensyl regenerates follicles or strengthens hair; the only human data are a small, unpublished manufacturer study.

learn Sulforaphane

Can sulforaphane protect hair follicles from inflammation and damage? In lab and mouse studies, sulforaphane reduced markers of inflammation and oxidative stress. No human study has tested whether it protects hair follicles.

learn Fluridil

Can daily Fluridil application stop hair follicle miniaturization? The single published fluridil trial (43 men; placebo-controlled for 3 months, then all on fluridil to 9 months) reported more hairs in the growth phase, but it never measured follicle diameter and has not been replicated — so whether daily use stops miniaturization is unproven, and community users describe stabilization rather than regrowth.

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