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why do bodybuilders inject b12 Vitamin is Essential for Building Bigger Muscles (Backed By Science) Why B12 Shots Are Popular
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djm.uodiyala.edu.iqTM Raqib, RK Polus, NS MohammadDiyala

Understanding the effects of B12 deficiency, its causes, and the signs of vitamin B12 deficiency early can help prevent long-term health problems
However, in a recent comprehensive and thoughtful review, Smith and Refsum argue that there is indeed a benefit to lowering homocysteine with B vitamin supplements, but that the efficacy depends on the characteristics of those being treated before supplementation is initiated (48)

The effect of ascorbic acid supplementation on the blood lead levels of smokers