This study found that betamethasone increased tyrosinase activity and melanin content in amelanotic melanocytes from human hair follicles, suggesting a potential mechanism for glucocorticoid treatment in vitiligo.
This overview of traditional Chinese medicine extracts discusses their effects on hair follicle development in various animal species but does not report specific experimental results.
April 2026 in “Ekologiya Cheloveka (Human Ecology)”
This review discusses current research on cosmetic formulations, especially those involving dihydroquercetin combined with other compounds, for promoting eyelash and eyebrow growth, noting challenges with solubility and bioavailability and the potential need for further studies to validate efficacy and safety.
August 2021 in “Journal of the American Academy of Dermatology”
This study reported that an anti-hair loss shampoo containing six active ingredients activated the Wnt/β-catenin pathway in human hair follicle dermal papilla cells in vitro.
PP405 was ineffective for hair growth as some follicles were already active before treatment, raising doubts about its efficacy. Users discussed other hair loss treatments like Minoxidil, finasteride, and RU58841, expressing skepticism and hope for future solutions.
Ultrasound imaging can non-invasively detect active and inactive hair follicles, inflammation, and fibrosis, potentially reducing unnecessary biopsies. It may help assess hair growth potential and diagnose scalp issues, but some users believe in trying treatments regardless of ultrasound results.
Finasteride prevents further hair loss by blocking DHT, while minoxidil stimulates hair growth by prolonging the active phase of hair follicles. Stopping minoxidil can lead to loss of regrown hair because finasteride does not address the same growth mechanism.
Finasteride is mainly for maintaining existing hair, while minoxidil is recommended for regrowth. Users suggest combining both treatments for better results, especially if there are signs of hair follicles still being active.
PP405 may revive dormant hair follicles but is unlikely to help with long-term baldness where follicles are replaced by scar tissue. It is seen as a potential adjunct to treatments like minoxidil and finasteride, but its effectiveness on deeply fibrotic or scarred areas is doubtful.
Can glycerin be used in combination with active ingredients like minoxidil or tretinoin?Glycerin is a common humectant that formulators treat as compatible with topical actives, but no published trial has tested it alongside minoxidil or tretinoin, so any benefit is comfort rather than a proven effect. Tretinoin is prescription-only and carries pregnancy warnings.