Don't believe lofty promises.
No single pill or powder will make you drop 30 pounds of flab in a month, pack on 30 pounds of pure muscle in a month, or ever give you the stamina of a 20-year-old. Supplements are intended to complement a nutritious diet, regular exercise, and other healthy habits — not be a miracle fix for whatever ails you. Yet some companies still make such promises about their products. This is especially common with supplements aimed at men, such as purported muscle builders, weight loss aids, and libido enhancers. Even though these aren't necessarily disease claims, they're not supported by any real evidence, and you shouldn't trust them. The rule is simple: If it sounds too good to be true, it is.