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Ingredient guide
Saw palmetto extract: evidence, dose and safety
Saw palmetto is the fruit of Serenoa repens, a palm native to the south-eastern United States. Extracts are made from the berries.
At a glance
- Strongest evidence
- C Limited
- Dose in our plans
- 320 mg a day for adults
- Adult upper limit
- 320 mg a day from food and supplements together
- Safety checks
- 2 situations and 1 medicine or supplement interaction, checked against your answers in every plan
- Reviewed
- Atrum Labs clinical team (MD, PhD), November 2026
What the research looked at
Each line is one body of research, graded A (strong) to D (weak). How we grade evidence. What each study measured is explained in your personal plan.
| Grade | Who was studied | References |
|---|---|---|
| C | Men with pattern hair loss |
|
How much
- Our plans usually use 320 mg a day for adults. The exact dose depends on your lab results, age and medicines.
- Adult upper limit: 320 mg a day from food and supplements together. Source: EMA HMPC community herbal monograph on Serenoa repens fruit (320 mg extract a day).
- Children's doses are set by age, and some ingredients are for adults only.
Who should not take it, or should check first
- Not suitable. Anti-androgenic activity; risk to a male fetus.
- Not suitable. Evidence is limited to male pattern hair loss; anti-androgen risk in people who could become pregnant.
Medicines and other supplements
- Not suitable. Duplicates 5-alpha-reductase inhibitor therapy (finasteride for prostate or hair loss, dutasteride).
Your plan is checked against every medicine you tell us about. If you take a medicine, ask your pharmacist or doctor before starting a new supplement.
Written and reviewed by the Atrum Labs clinical team (physician-scientists, MD, PhD) from our clinical knowledge base, version 0.2.0-draft. This page is general information, not medical advice. Food supplements are not a substitute for a varied, balanced diet and a healthy lifestyle.
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