March 16, 2009 -- Question: Do foods that contain boron lower risk for developing prostate cancer?
Answer: Boron is an element that is found in foods such as peanut butter, wine, grapes and other fruits, like peaches. And it has been explored for association to prostate cancer due to some evidence that higher levels of boron are associated with lower risks of prostate cancer. There was a large study that was conducted in over 35,000 men that looked at intake of boron based on these foods from a food frequency questionnaire and did not actually find a significant association to a decreased prostate cancer risk.
So, at this time, there is no official recommendation for boron supplementation or increasing food intake that contains boron in terms of reducing prostate cancer risk.