research Human hair follicle: reservoir function and selective targeting
The human hair follicle can store topical compounds and be targeted for drug delivery with minimal side effects.
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5 / 1000+ resultsresearch Dose-dependent and long term effects of RU58841 (androgen receptor blocker) on hair growth in the bald stumptailed Macaque.
In this study using a macaque model, RU58841 at a 5% concentration significantly increased hair density, thickness, and length in the frontal bald scalp over six months.
research Cellular and developmental aspects of androgenetic alopecia
This article examines the terminal to vellus transition in androgenetic alopecia through cellular and developmental mechanisms, discussing challenges and knowledge gaps without presenting new clinical findings.
research Penetration Profile of Microspheres in Follicular Targeting of Terminal Hair Follicles
This study found that using a standardized protocol with microspheres of approximately 1.5 micrometers enhances penetration into hair follicles, particularly when skin is treated with cyanoacrylate skin surface stripping.
research Selective follicular targeting by modification of the particle sizes
This study found that medium-sized particles (643 and 646 nm) penetrated deeper into porcine hair follicles in vitro than smaller or larger particles, suggesting size-selective targeting within follicular sites.
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5 / 567 resultscommunity Confused why people are calling PP405 a cure...it never claimed to be able to undo miniaturization or revert vellus back to terminal hairs. It seems to be more of a growth stimulant like minoxidil.
PP405 is not a cure for hair loss but may reactivate dormant hair follicles, similar to minoxidil. It is unlikely to help with miniaturized or vellus hairs and is still in trial phases, with availability expected around 2030.
community Found a slide summary for PP405
PP405 shows promise in stimulating new terminal hair growth by activating dormant follicles, with no systemic adverse effects observed in a short-term trial. However, long-term efficacy remains unproven, and further trials are needed to confirm its potential as a hair loss treatment.
community Why not move miniaturized hair follicles somewhere else to treat them? Alternative to hair cloning?
Exploring the idea of transplanting miniaturized hair follicles to healthier areas to potentially reverse hair loss, with concerns about DHT sensitivity and scar tissue formation. The conversation also humorously considers using mice for hair growth experiments.
community PP405 Won’t Work: Follicle Is Miniaturized, Fibrosed, And Missing Key Support Cells
PP405 is ineffective for miniaturized, fibrosed hair follicles in androgenetic alopecia. AMP303 may activate hair follicle stem cells, but minoxidil and finasteride are still the main treatments.
community Topical Minoxidil since April 2025. Finasteride since Sept 2025. Bald spot has gotten larger in area size and more noticeable in recent months. Trying to be patient but situation doesn’t seem to be resolving
The user has been using topical Minoxidil since April 2025 and Finasteride since September 2025, but their bald spot has worsened. They are considering switching to oral Minoxidil and have been advised to be patient, see a dermatologist, and possibly try additional treatments like derma rolling.
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