I actually wrote an essay for this recently to update my personal training certification.... I'mma go find a good quote from it or somethin... "I personally have never used a supplement beyond the occasional vitamin or protein shake mainly because I am a very stubborn individual. I feel that if you change your diet to include these things without having to go outside of it, you are doing yourself a service in the long run. Not all people are that dedicated to it, or feel they have the time to sit down and figure it all out for themselves. So they go to the local GNC looking for their life's answer. It is here they find business people, not nutritionists. They are there to sell a product, and they will do that the best way they know how to- dressing up a product so it appeals to the buyer. This is where the problem begins. If people haven't previously done their own homework or even asked their doctor about it, they could be getting themselves into trouble. Don't know what Ephedra is? Well you might be putting yourself at risk for high blood pressure and a eventual stroke. Many other products could be doing more harm than good for people without them even knowing, which is very alarming and very real." Edit about Protein Shakes: Show me one omnivorous person in the United States that does NOT eat enough protein in their diet. The servings for any portion of meat anywhere are so gargantuan that I bet you 95% of Americans that eat meat are gettin' enough protein. Protein is not stored in the body as protein- it's stored as glucose. The body cannot store protein. Glucose is energy, but if not used, it's turned to fat. The protein that cannot be turned into glucose is excreted from the body. Any nutritionist worth their degree will tell you that you DO NOT NEED PROTEIN SHAKES. That is a myth of lifting, and it's amazing how many people waste their good money on protein shakes which, essentially, they are just shittin' out.