A study published by Environmental Health Perspectives shows that men who are exposed to high levels of Bisphenol A (BPA) may experience a significant increase in testosterone in the bloodstream, but the testosterone level is still in the normal range in most cases. This effects free testosterone levels, too.

An elevated level of testosterone in the blood has been linked to an increased risk of heart disease and some types of cancer. BPA is the chemical found in the liners of feeding cups, beverage and food cans, baby bottles, and other consumer products, but whether BPA significantly impacts testosterone production and whether it has any impact on health is still a mystery.