Regrowth Labs FIN25 by Sapphire Healthcare is a topical hair regrowth treatment containing 0.25% Finasteride, a 5α-reductase inhibitor that prevents the conversion of testosterone to dihydrotestosterone (DHT). This product is designed to treat hair loss on the entire scalp, including both the vertex and hairline. The formulation includes Propanediol, a plant-based alternative to Propylene Glycol, which reduces skin irritation and enhances absorption. Propanediol also provides moisturization and serves as an effective carrier for active ingredients and botanical extracts.