Testosterone Increase Info… A testosterone enhancer is a term used to describe products that have been shown to or are suspected to cause a testosterone increase in healthy men. There are a great many products, usually herbal, on the market that make this claim. Sometimes referred to as boosters, non-prescription testosterone enhancers are classified as dietary supplements and so are not controlled or regulated by the FDA. The FTC (Federal Trade Commission), however, will investigate fraudulent claims and the company must be able to provide evidence to support those claims. Eurycoma L...