Do testosterone boosters work?

There is no responsible one-word answer for an entire product category. Products use different ingredients, doses and claims, while studies examine different populations and outcomes.

Ask what “work” means

A change in a laboratory marker, a subjective outcome and a clinically meaningful improvement are different endpoints. Evidence for one does not automatically establish the others.

Match evidence to the claim

FTC guidance emphasizes that health-product claims should have competent and reliable scientific evidence relevant to the claim. Evaluate each finished product and claim rather than assuming the category works as a whole.