Thanks to recent leaps and bounds in the science behind nutrition supplements, most new fat-burning products contain a selection of several ingredients. Each ingredient is effective on its own—but together, they help maximize the effects of each.
That's great news for your waistline and your wallet. Trying to get all of these ingredients would be overkill and a waste of your money. Instead, look for supplements that have two or more of these ingredients, along with other established fat-burners like green tea extract and caffeine. (Sesamin, for example, is readily available as a stand-alone, and can be taken to supplement any multiple-ingredient fat-burner.)
Regardless of the product you choose, follow label instructions closely for the best and safest way to take them.