1.Scrutinize the label. The FDA does not regulate health supplements, so manufacturers can pretty much put whatever they want there. You know the manufacturer is bluffing when they claim that the supplement (a) is a replacement for the prescribed medicatin you are currently taking, (b) is a 'cure-all' formulation, or (c) dies not have any side effects. If you see any of these statements (and other such dubious statements) on the label, do not buy the supplement.
What do the labels of quality natural health supplements say, then$%: It should contain important, unbiased information. The label must clearly contain the name, form, and amount of every ingredient used. Labels of quality natural health supplements should also state exactly how many tablets are in the container (or the number of grams in the case of powdered supplements). Also look for the expiration date and batch number.