May 2025 in “ACS Pharmacology & Translational Science”
In this study, researchers found that proteins derived from stressed mesenchymal stemcells, stimulated using the root extract of Atalantia monophylla, successfully promoted hair growth and activated hair follicle stemcells in a mouse model of androgenetic alopecia through the Wnt and TGF-β pathways.
This study found that germinated hemp seeds extract and exosomes from their calli can prevent androgenetic alopecia by modulating genetic, cellular, and immune responses in hair follicle dermal papilla stemcells and CD8+ T cells, with exosomes being more effective.
January 2022 in “Stem cell biology and regenerative medicine”
This review explores the use of stemcell-based therapies for hair regeneration, highlighting the potential benefits of stemcell-derived conditioned medium, but stresses the need for more rigorous clinical trials to substantiate its efficacy.
April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology”
This study found that DNA-damaged hair follicle stemcells in mouse models do not show typical senescent markers but are dynamically expelled to maintain tissue health and prevent hair loss.
Stress can lead to hair loss by affecting hair-follicle stemcells, and this loss is harder to recover from if one has male pattern baldness (MPB). Treatments like finasteride and minoxidil are used to address hair loss, but stress-related hair loss differs from androgenic alopecia.
Corticosterone inhibits GAS6, affecting hair follicle stem-cell activity, with potential implications for stress-related hair loss. Ashwagandha and Vitamin K are suggested for reducing cortisol, but their effectiveness is debated.
A 39-year-old experienced hair regrowth on his temples after switching from finasteride to topical RU58841 combined with 5% minoxidil. He also underwent stemcell treatment and noticed improvements, attributing the regrowth mainly to the change in treatment.
Hair loss is linked to cellular physiology and the IGF-1 to TGF-B1 ratio, not just androgen sensitivity. The theory lacks evidence, while finasteride and minoxidil are effective treatments.
Federal funding cuts have delayed PP405 research, affecting hair loss treatment progress, though clinical trials will continue. The discussion highlights PP405's potential compared to minoxidil and finasteride and stresses the importance of government-funded research.
Can stem cell factor be combined with other topical hair loss solutions?No published human trial has tested topical stem cell factor alongside minoxidil or other established treatments, so neither the safety nor the benefit of the combination has been established. Community users report layering these products, but that is anecdote rather than clinical evidence.
Got small bald patches they say are from stress? PP405 sprays could help bring them back to life.PP405 is an experimental topical gel from Pelage Pharmaceuticals that inhibits the mitochondrial pyruvate carrier; its registered Phase 2 trial (NCT06393452) tested it once daily in 78 adults with pattern hair loss, for safety and tolerability. It is not approved, not for sale, and has not been studied in alopecia areata or stress-related shedding.