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N-Acetylcysteine, a precursor your body uses to make glutathione and support normal liver function

Vitamin B12 (also called cobalamin) promotes healthy nervous system function and can be added to your diet through shellfish, meat, poultry, eggs, milk, dairy, and fortified products like cereals, soy, and nutritional yeast

Those with nerve problems might need more B12 to feel better

Growth hormones promote protein synthesis that helps build and repair muscle tissue

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If your results look slower or smaller than someone elses, its almost always one of these factors