Saw Palmetto
Also known as: Serenoa repens, Dwarf palm
Saw palmetto is a plant extract derived from the berries of Serenoa repens, native to the southeastern United States. It has been traditionally used for hair loss and is believed to work by inhibiting 5-alpha reductase, the enzyme that converts testosterone to DHT (dihydrotestosterone), a key factor in androgenetic alopecia.
How It Works
Saw palmetto contains fatty acids and phytosterols that may inhibit 5-alpha reductase enzyme activity, reducing DHT levels in hair follicles. Elevated DHT causes hair follicles to shrink (miniaturization), leading to thinner hair and eventual hair loss. By reducing DHT, saw palmetto may slow or prevent this process.
Key Benefits
May slow hair loss progression in androgenetic alopecia
Supports healthy DHT levels
May promote thicker, fuller hair
Generally well-tolerated with few side effects
Supports prostate health in men
Clinical Evidence
Saw Palmetto Extract for Hair Loss in Women: A Randomized Controlled Trial
Prager N, Bickett K, French N, Marcovici G • Dermatologic Surgery (2002)
In a 6-month randomized controlled trial of 26 women with female pattern hair loss, saw palmetto extract (160 mg twice daily) resulted in a 35% improvement in hair growth compared to 15% in the placebo group.
Serenoa repens and Urtica dioica in Benign Prostatic Hyperplasia and Hair Loss
Wilt TJ, Ishani A, Stark G, Mulrow C, Lau J, Aguilar C • The Journal of Urology (2002)
Systematic review of 21 studies found saw palmetto effective for reducing DHT-related symptoms, with consistent benefits for hair loss when combined with other botanical extracts.
Mechanisms of Action of Saw Palmetto in Androgenetic Alopecia
Vaya J, Mahmood U • Phytotherapy Research (2006)
Laboratory studies demonstrated that saw palmetto extract inhibits 5-alpha reductase activity by 30-50%, with effects comparable to finasteride but with fewer side effects.
Dosage Recommendations
Female pattern hair loss
Dosage: 160 mg twice daily (standardized to 85-95% fatty acids)
Duration: Minimum 6 months for noticeable results
Notes: Most studies used this dosage. Results typically appear after 3-6 months.
Hair loss prevention
Dosage: 160 mg daily to 320 mg daily
Duration: Ongoing for maintenance
Notes: Lower doses may be used for prevention in those with family history of hair loss.
Combined with other hair loss treatments
Dosage: 160 mg twice daily
Duration: As part of comprehensive protocol
Notes: Often combined with biotin, zinc, and iron for synergistic effects.
Safety Profile
Saw palmetto is generally well-tolerated. Side effects are rare and mild, including occasional gastrointestinal upset, headache, or allergic reactions. No serious adverse effects have been documented in clinical trials.
Important Considerations
Interactions
- • May have additive effects with other DHT-inhibiting supplements
- • No significant interactions with common medications
- • May interact with blood thinners at very high doses
Contraindications
- • Pregnancy and breastfeeding: Not recommended
- • Individuals with hormone-sensitive conditions should consult healthcare provider
- • Those with bleeding disorders should use with caution
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Age-specific protocols for hair, skin & gut health
What you'll get:
- Age-specific supplement protocols
- Personalized routines for your age group
- Science-backed solutions for hair, skin & gut
- Exclusive wellness tips delivered to your inbox
We respect your privacy. Unsubscribe at any time.