Enlarged prostate (BPH)
Do Prostate Supplements Work? What the Evidence Says
Saw palmetto, beta-sitosterol, pygeum, zinc: what the most rigorous studies actually show about prostate supplements.
Dr. Bruno Rubí López
Urólogo · Céd. esp. 12831401 · Hospital Ángeles Puebla
May 16, 2026 5 min read
The internet is full of supplements that promise to “shrink” or “cure” the prostate. Wanting a simple fix is natural, but it’s worth knowing what the scientific evidence actually says before you spend money on them — or, worse, put off a medical evaluation.
What they are and what they promise
The most popular prostate supplements include extracts such as saw palmetto (Serenoa repens), beta-sitosterol, pygeum and zinc. They are sold over the counter and are often marketed as remedies for the urinary symptoms of an enlarged prostate.
What the evidence says
The most rigorous, largest studies have not shown that these supplements improve the symptoms of benign hyperplasia any more than a placebo. The evidence is, at best, weak and inconsistent. This does not mean they are harmful in most cases, but it does mean they should not be considered a reliable treatment.
The risk of self-medicating
The main problem is not the supplement itself, but what it can hide: relying on a product without an evaluation delays the diagnosis of a problem that does have effective treatment. In addition, some supplements can interfere with medications or alter test results such as the PSA.
The professional recommendation
If you have urinary symptoms, the wisest step is an evaluation with a urologist. Today there are treatments with solid evidence — from medication to HoLEP laser surgery — that truly resolve the problem. If you want to add a supplement, discuss it with your doctor so you can do it safely.
Si tienes molestias urinarias o quieres una valoración de próstata, escríbenos por WhatsApp y agendamos tu consulta con el Dr. Bruno Rubí.
Message on WhatsAppFrequently asked questions
Does saw palmetto work for the prostate?+
The most reliable studies have not shown that it improves enlarged-prostate symptoms beyond a placebo. It is not considered an effective treatment.
Can supplements replace medical treatment?+
No. They do not replace an evaluation or evidence-based treatments. Relying on them alone can delay the diagnosis of a treatable problem.
Are prostate supplements dangerous?+
Most are well tolerated, but some can interfere with medications or with tests such as the PSA. That is why you should always discuss them with your urologist.