What are the benefits of saw palmetto? Explore its traditional uses, the evidence for prostate health, and what to look for in a men's health supplement.
🕒 5 min read
What is saw palmetto?
Growing wild in the south-eastern USA, saw palmetto (Serenoa repens) is a small palm with distinctive saw-toothed leaves. Its dark berries have a long history of use for health purposes and are used to make the extracts found in supplements.1
The berries contain fatty acids and plant sterols. When comparing supplements, it helps to understand both the amount of extract and the fatty-acid content, rather than looking at the extract weight alone.
Saw palmetto benefits and uses: what does the evidence say?
Traditional use for men's urinary health
Saw palmetto is widely associated with urinary symptoms linked to an enlarged prostate. These include a weak stream, frequent trips to the bathroom and getting up at night to urinate. Its history of use explains why it remains a familiar ingredient in men's health supplements.1
What modern studies have found
A 2023 Cochrane review assessed 27 studies involving 4,656 men. The most reliable evidence found that saw palmetto alone made little or no difference to urinary symptoms or quality of life compared with placebo. Findings for combinations with other herbs were less certain. Saw palmetto has not been shown to prevent prostate enlargement or replace treatment for it.2
Benefits of additional nutrients in a combination formula
A supplement may combine saw palmetto with nutrients that have their own established functions. Zinc contributes to maintaining normal testosterone levels in the blood, while selenium contributes to normal sperm production. These are benefits of the nutrients themselves and should be distinguished from claims about saw palmetto or urinary symptoms.4
Saw palmetto and prostate health
The prostate sits below the bladder, around the urethra. Enlargement can put pressure on this tube and affect urine flow. Benign prostate enlargement is common after 50 and is not the same as prostate cancer.3
Symptoms to recognise
- Difficulty starting to urinate.
- A weak or interrupted stream.
- A feeling that the bladder has not emptied.
- Needing to urinate more frequently or urgently, including at night.
See your GP about these changes: symptoms can have different causes. Seek an urgent GP appointment or NHS 111 advice if you cannot urinate, have blood in your urine or pain when urinating.3
Everyday steps that may help
For diagnosed prostate enlargement, cutting down on caffeine and alcohol and drinking less just before bed may help. Keep drinking enough during the day. Your GP can advise on lifestyle measures and medicines according to how much symptoms affect you.3
How to choose a saw palmetto supplement
Start with the label: what does one daily serving actually provide? A standardised extract specifies the amount of a constituent, such as fatty acids. This makes the formulation clearer, although standardisation alone does not establish a health benefit.
Healthspan Saw Palmetto for Men's Health combines saw palmetto extract with pumpkin seed oil, evening primrose oil, tomato extract, zinc and selenium. Its vegan capsules contain extract standardised to a minimum of 85% fatty acids.
Saw Palmetto for Men's Health
A combination formula with zinc and selenium
- 160mg saw palmetto extract per capsule
- Zinc for maintaining normal testosterone levels
- Selenium for normal sperm production
- One daily capsule; suitable for vegans
For other nutritional options, explore our men's health supplements. Consider which nutrients fit your diet and goals, and check for overlapping ingredients if you take several products.
Are there any side effects?
Saw palmetto is generally well tolerated in studies. Reported side effects are usually mild and uncommon, including digestive upset, dizziness and headache. It may be unsafe during pregnancy or breastfeeding.1
If you take prescribed medicines or have a medical condition, check with a healthcare professional before starting a supplement. If you experience an adverse reaction, stop taking it and seek medical advice.
Saw palmetto FAQs
What is saw palmetto good for?
Saw palmetto is best known for its traditional use in men's urinary health. Modern research has focused on symptoms linked to benign prostate enlargement. The evidence findings above help put this history into context. For wider nutritional support, look at the complete formulation: added zinc and selenium have established roles in male reproductive health.4
What should I look for in a saw palmetto supplement?
Compare the amount of extract per daily serving, whether its fatty-acid content is standardised, and any additional ingredients. Check dietary suitability and the recommended intake too. These details make it easier to compare like with like, rather than choosing on the biggest number on the front of a pack.
How much saw palmetto should I take?
Follow your chosen product's label, as formulations vary. Healthspan Saw Palmetto for Men's Health provides 160mg extract per capsule; the adult directions are one capsule daily with water. Do not exceed the recommended intake.
When is the best time to take saw palmetto?
Choose a regular time that makes the labelled daily serving easy to remember. There is no established best time of day for saw palmetto. Check the pack for any instructions about taking it with food.
How long does saw palmetto take to work?
There is no reliable six-week deadline for urinary improvements. Trials lasting several months have not established a meaningful benefit from saw palmetto alone. If urinary symptoms are your main concern, a symptom record can help your GP assess changes and decide what support you need.2
Does saw palmetto increase testosterone?
Saw palmetto is not established as a testosterone booster. Zinc in a combination supplement contributes to maintaining normal testosterone levels in the blood. Maintaining normal levels is different from increasing testosterone above the normal range.4
Does saw palmetto affect a PSA test?
Saw palmetto does not appear to alter PSA readings, even at higher amounts. PSA is a protein produced by the prostate, rather than an enzyme. Tell your GP about all medicines and supplements before a test so they can interpret the result in context.1
Can I take saw palmetto with prostate medication?
Ask your pharmacist or GP before combining it with prescribed medicines, including treatment for an enlarged prostate. Take your product label or ingredient list with you so they can check the complete formulation.1
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