You should work with your healthcare provider to find out if a health supplement is safe for use. The Food and Drug Administration (FDA) does not determine the safety of a supplement before it is sold in the market. So, your doctor, pharmacist, or dietician can, to a large extent, help you to decide if a product can be helpful to you.
There are certain scientific proofs on the benefits of certain diet supplements on the body, however you should not use these products as drugs to treat certain health conditions or diseases. Dietary supplements are not drugs; they only help to supplement diets. Just as their usage should not replace food, it equally important that their usage should not take the place of drugs.
When using diet supplements, it is also important to consider the Recommended Daily Allowance (RDA) and Daily Value (DV) of the product.
The RDA is the number of milligrams recommended to be taken by the adult, child, or pregnant mother on daily basis. RDA was developed by the Food and Nutrition Board at the Institute of Medicine of the National Academies.
The RDA of certain supplements for men is 1000mg/day. DV is the percentage of the nutrient required by individuals of certain age.