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Topical finasteride may have higher systemic absorption and lower efficacy when using a Propylene Glycol/Ethanol formulation compared to the hydroxypropyl chitosan (HPCH) formulation. The safety profile of topical finasteride relies heavily on the HPCH formulation, and using standard solutions might lead to different pharmacokinetics.

The conversation discusses whether 2.5mg of dutasteride or 200mg of testosterone weekly is more influential in preventing hair loss, with various personal experiences indicating that the effectiveness is dependent on the individual's genetic profile. Some users report that dutasteride is likely to be more effective at the given doses.

Pyrilutamide shows minimal systemic absorption with low plasma levels and no accumulation, suggesting it's unlikely to cause systemic side effects. However, full results are not yet published in scientific journals.

PP405 showed 31% regrowth in a short trial, but its effectiveness is debated compared to Minoxidil and Finasteride. Some argue AGA isn't scarring, while others believe it leads to fibrosis, affecting treatment outcomes.

RU58841 can be absorbed systemically after topical application, but the study did not find immediate hormonal disruption. The study highlights the need for more research on long-term safety and effects of RU58841, as well as the importance of quality control in products from the grey market.