
Our trainer wanted us to take an amino acid complex to "increase nitrogen retention and increase muscle mass, prevent protein catabolism during prolonged exercise, stimulate muscle glycogen resynthesis after exercise, and exercise anemia." by promoting prevent increased synthesis of hemoglobin, myoglobin, oxidative enzymes and mitochondria during aerobic exercise. I use more weight and get less tired at the end of my workout. So unless there is another mitigating factor, I will say this product works for me.

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