Hydroxylation of Dehydroepiandrosterone in Human Scalp Hair Follicles

The conversation discusses the hypothesis that a lack of the enzyme 3-alpha hydroxysteroid dehydrogenase (3α-HSD) on the scalp may contribute to hair loss by allowing DHT to accumulate. Despite interest in this theory, no recent research has been conducted, and current treatments like finasteride and minoxidil remain the most supported options.

Topical finasteride (P-3074) can inhibit scalp DHT by up to 70%, with some users experiencing systemic absorption similar to oral use. Users discuss varying application frequencies and concentrations, with some noticing side effects when overused.

High DHEA levels may contribute to hair loss by increasing DHT in hair follicles, potentially explaining why finasteride is ineffective for some. Treatments like high-dose dutasteride and RU58841 are suggested, but the underlying cause, such as adrenal issues, should be investigated.

Epristeride is a selective 5 alpha reductase type 2 inhibitor that may reduce scalp DHT similarly to finasteride, with potentially fewer side effects. It is suggested that combining epristeride with finasteride or dutasteride could enhance hair loss treatment effectiveness.

The user is experiencing intense hair shedding all over the scalp after applying pyrilutamide to the hairline and taking oral castor oil. They are also using topical finasteride and latanoprost, but are unsure which treatment is causing the shedding.

The conversation discusses using cyproterone acetate at 12.5 mg to manage hair loss, with concerns about its effects on testosterone and potential health issues. Other treatments mentioned include finasteride, dutasteride, minoxidil, and RU58841, with varying experiences and outcomes.