community If half life of fin is 6-8 hours in the blood but 5-6 days in tissue (scalp) why don't people apply topical every 3-4 days to minimize systemic?
The discussion revolves around the frequency of applying topical finasteride for hair loss treatment. The main question is whether applying it every 4-5 days could still be effective, given that its half-life in the scalp tissue is 5-6 days.