Research demonstrates that taking 200 milligrams of saw palmetto twice daily is an effective dosage for treating hair loss. Approximately 60 percent of men in a research study reported that saw palmetto reduced balding after taking the supplement orally for a few months, states Healthline.
An extract of saw palmetto berries may be an effective hair loss treatment because it blocks an enzyme that converts testosterone to dihydrotestosterone, or DHT, the enzyme that causes hair loss. Components of saw palmetto work in a similar manner to synthetic ingredients in prescription medication used for treating hair loss. Saw palmetto in the form of capsules and tablets is used in research studies on hair loss, according to Healthline.