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I might be wrong in the answer but I believe you are refering to creatine. A substance secreted by the human body using the liver in conjuntion with the kidneys at a rate of 15 grams a day. We stop developing these amounts with age but now science have left us with plenty of suplements to provide this creatine need for muscle growth.

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∙ 15y ago

What else can I help you with?