Functional foods are just what they sound like: targeted nutrition that bodybuilders can use for very specific health, digestive, and supplemental functions. Some are wide-spectrum meal replacements such as ProSource's NutriPure Supreme and Lean Body. Some are healthy on-the-go snacks like protein RTDs, beef snacks, or protein bars. Other functional foods serve even more specific goals such as fiber supplements, healthy fats for energy, peanut butter, and more. If you're looking for a supplement alternative that doesn't quite fit the main categories, you're likely to find it here!