What is the recommended dosage for Saw Palmetto?

General: 320 mg/day; Hair Loss: 320 mg/day standardized extract

What are the side effects of Saw Palmetto?

Potential side effects include: Mild gastrointestinal upset (nausea, diarrhea), Headache, Dizziness, Rare: decreased libido.

How does saw palmetto work for hair loss?

Saw palmetto is believed to inhibit 5-alpha-reductase, the enzyme that converts testosterone to dihydrotestosterone (DHT). Elevated DHT levels are associated with follicle miniaturization in androgenetic alopecia. Several small clinical trials suggest that saw palmetto may support hair density, though the evidence is less robust than for pharmaceutical options like finasteride.

Can saw palmetto be combined with finasteride?

Both saw palmetto and finasteride target the 5-alpha-reductase enzyme, so combining them is generally not recommended without medical supervision. There is limited research on the safety and efficacy of using both concurrently. Consult a healthcare provider before combining these approaches, as they may have additive effects on hormone metabolism.

What dosage of saw palmetto is used in hair loss studies?

Clinical studies on saw palmetto for hair loss typically use 320 mg daily of a standardized extract containing 85-95% fatty acids and sterols. A 2020 systematic review found that this dosage was the most commonly studied. Results are generally assessed after 12 to 24 weeks of consistent use.

How long does saw palmetto take to show results for hair loss?

Clinical studies on saw palmetto for androgenetic alopecia typically evaluate outcomes at 6 to 24 months. Research across 21 studies with 2,123 participants shows gradual improvements in hair density and reduced shedding over this timeframe. Because saw palmetto modulates DHT production — which affects the hair follicle miniaturization cycle — significant visible changes take longer than acute treatments and require consistent daily use.

Does saw palmetto work for female hair loss?

Research across 3 studies with 120 participants supports Moderate (Grade B) evidence for saw palmetto in female pattern hair loss. Women's hair loss involves androgen sensitivity at the follicle level, similar to men, though typically with different DHT dynamics. Saw palmetto's 5-alpha-reductase inhibition may support hair retention in women with androgen-sensitive follicles. The evidence base is smaller than for men — larger randomized trials are needed.

Saw Palmetto

herb

Also known as: Serenoa repens, Sabal serrulatum

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About

Saw palmetto is a plant extract derived from the berries of Serenoa repens that acts as a natural 5-alpha-reductase inhibitor. It may help reduce DHT levels associated with androgenetic alopecia, though its potency is considerably lower than pharmaceutical alternatives like finasteride.

How It Works

Inhibits 5-alpha-reductase, reducing DHT conversion which miniaturizes hair follicles in androgenetic alopecia.

Evidence For Conditions

Condition	Grade	Studies	Participants
Androgenetic Alopecia	A	22	2123	View →
Female Pattern Hair Loss	B	3	120	View →

Side Effects

Mild gastrointestinal upset (nausea, diarrhea)
Headache
Dizziness
Rare: decreased libido

Drug & Supplement Interactions

Anticoagulants and antiplatelet drugs (may increase bleeding risk)
Oral contraceptives and hormone replacement therapy (anti-androgenic effects)
Finasteride and dutasteride (additive 5-alpha-reductase inhibition)

Always inform your healthcare provider about all supplements you take.

Related Ingredients

Ashwagandha Curcumin Fenugreek Ginseng Green Tea Extract

Quick Facts

Dosage: General: 320 mg/day; Hair_Loss: 320 mg/day standardized extract
Forms: capsule tablet liquid topical
Natural Sources: Saw palmetto berries
Upper Limit: Not established
Best Time: With meals to reduce gastrointestinal side effects

Evidence Summary

Androgenetic Alopecia A

Female Pattern Hair Loss B

FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.