This is essentially a legal issue. The FDA categorizes Nutritional Supplements as a Food and not a Drug. A supplement must be “safe for consumption”. A supplement company may say just about anything they want about their product…as long as they post a disclaimer (ie: supplement X is not intended to diagnose or treat a medical condition). On the other hand, a drug is intended to diagnose or treat a medical condition. All drug benefit claims must have scientific proof to back up those claims.