The key reason why peanut butter can help with alleviating BPH symptoms lies in beta-sitosterol, which is a type of plant-based, cholesterol-inhibiting compound called phytosterol (per the Cleveland Clinic). As explained by Mount Sinai experts, beta-sitosterol, which is touted for its cholesterol-lowering abilities, may also benefit people with BPH. Research has shown that while beta-sitosterol does not reduce prostate size, it can not only facilitate more thorough emptying of the bladder, but also ensure consistency in the flow of a person’s urine.
In a 2000 study published in Nutrition and Cancer, researchers took note of the amount of phytosterols in peanuts and peanut products, prompted by evidence that the compounds can potentially protect against breast, colon, and prostate cancer. They found that 100 grams of roasted peanuts can contain between 61 and 114 milligrams of phytosterols, up to 83% of which is beta-sitosterol. In comparison, the same amount of peanut butter can have up to 157 milligrams of phytosterols; given that peanut butter accounts for approximately half of Americans’ peanut consumption, this makes the spread an excellent beta-sitosterol source.