Supplements can be harmful to health. Too much for too long, especially the fat soluble vitamins A, D, E and K, can reach toxic levels.
Some people might consider supplements as protection against bad choices in your daily diet and justify the continuation of those bad choices. Moreover, one can consider the extras like health insurance and not go to receive medical care promptly.
Athletes may consume protein supplements to build muscle, when in reality all it does is the hard exercise. The typical diet provides approximately twice the recommended daily requirement of protein. Too much protein may not be as healthy.
