“Creatine Monohydrate and Creatine Ethyl Ester. Creatine Monohydrate has been documented of showing wonderful results when complemented by a proper diet, adequate exercise and other protein supplements. However it may cause cramps and bloating. Creatine Ethyl Ester has fewer side effects and is comparatively new in the market. It can be incorporated in the diet to supplement the body’s intake of proteins. Many people go under the knife or use steroids to build muscle. However these may prove detrimental in the long run. It is best to avoid all artificial ways of pumping up muscles.” Source “Protein supplements? There is no evidence whatsoever that they offer any advantage over dietary protein. Amino acids? Even GNC acknowledges that there is “little scientific support and/or minimal health benefit” to taking them. Creatine? Over 30 percent of people who take it do not even retain it in their muscle tissues long enough to utilize it. Studies have shown, though, that taken for five to six days by sedentary or moderately active people, supplemental creatine will improve performance and delay muscle fatigue during short-duration, high-intensity exercise like weight lifting. Wow! All that for only a couple of dollars per day! And the side effects and risks of supplemental creatine? Muscle cramping and diarrhea are not uncommon. There have been reports of kidney damage from creatine supplementation. Certainly, people with kidney disease should not risk taking it.” Source “While there is continuing debate among medical professionals as to the precise effects of these supplements, several doctors at other hospitals who were interviewed yesterday said that . . . DHEA and similar chemicals have been linked to long-term side effects like high blood pressure, heart disease and impotency.” N.Y. Times There are lots more. It looks not worth it to me.