Advanced amino formula is the only product that I have tried for a workout enhancer. I was hoping to increase the level of my workouts, and help me to recover more quickly. I’m 72 years old and don’t push it to the extremes when working out. Mainly trying to keep fit and toned. Several months after using this product, I had a physical with my cardiologist. Results came back and the doctor was surprised that my cholesterol levels had gone up substantially. Because Advanced Amino Formula was the only thing I had taken before the physical, I just assumed there was something in the formula to make my cholesterol go up. I had to stop working out because I underwent back surgery. I’ve had trouble with my back for many years and decided to go under the knife to get it fixed once and for all. I still don’t know if theirs is anything in the formula that causes the cholesterol to increase, but it’s the only thing different that I was taking. It did seem to help me recover from the workouts faster and allowed me to increase my stamina during workouts. It will be approximately a year before I heal totally and can start working out again.