Prostate supplements are marketed with a wide range of ingredients and claims. A better way to evaluate them is to separate four questions: what is in the formula, how much is present, what independent human evidence exists, and whether evidence applies to the finished product.
Evidence before marketing
NIH sources note that many supplements marketed for men's health have not been shown to be safe or effective. Saw palmetto, one of the best-known ingredients in this category, has not shown meaningful benefit when used alone for BPH symptoms in recent evidence reviews.