Saw Palmetto for Hair Loss: How This Natural DHT Blocker Helps Fight Androgenetic Alopecia Saw palmetto has become one of the most researched natural remedies for hair loss, especially in cases of androgenetic alopecia (AGA) — the most common type of hair thinning in both men and women. Derived from the berries of the Serenoa repens plant, saw palmetto is believed to act as a 5-alpha-reductase inhibitor , much like the prescription medication finasteride . By reducing the conversion of testosterone into dihydrotestosterone (DHT) — the hormone responsible for shrinking hair follicles — saw palmetto may help slow down or even prevent hair loss and support thicker, healthier regrowth. How Saw Palmetto Works for Hair Loss Blocks DHT: Saw palmetto inhibits 5-alpha-reductase, the enzyme that converts testosterone into DHT. Protects Hair Follicles: Lower DHT levels help prevent hair follicle miniaturization, a key cause of AGA. Supports Hair Regrowth: By preserving folli...