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Optimal Stack is a muscle gain supplement. The product is presented to feature such options as Ultimate Muscle Gain, Extreme Energy Boost, Burn Off Fat Quickly, as well as Get Ripped Fast, etc. Optimal Stack is promised to be a very powerful supplement. It consists of proprietary blend potent ingredients which are intended to help one stack on lean muscle in a short period of time. In addition, Optimal Stack is also supposed to result improved sexual performance. The product is available online. There it is described to be all natural muscle building formula. Optimal Stack was designed to increase muscle strength, endurance, and protein output.