The Measurement of Haloperidol and Reduced Haloperidol in Hair as an Index of Dosage History

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.

Topical finasteride reduces scalp DHT, with some going systemic. Using 0.025% at 1ml per day can stabilize hair loss without side effects.

A 19-year-old used a 0.01% topical finasteride formula, which unexpectedly lowered DHT levels significantly. They are considering reducing the dose further and exploring alternatives like ketoconazole shampoo, KX826, and CB to manage hair loss while minimizing systemic absorption.

Topical finasteride results in plasma levels 100 times lower than oral finasteride, potentially reducing systemic side effects. Users report similar efficacy with fewer side effects, suggesting a preference for topical application.

Reducing scalp DHT doesn't directly correlate with preventing hair miniaturization, as different follicles have varying sensitivity levels. Dutasteride at 0.5 mg and 2.5 mg shows minimal visual difference in hair regrowth, with side effects being a consideration for higher doses.

The user reduced serum DHT by 60% using Advanced Trichology's natural DHT blocker but saw no improvement in hair loss. They are considering switching to finasteride due to its proven effectiveness in inhibiting scalp DHT.