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May 21, 1993
Now, while B12 doesn't directly cause weight gain, a deficiency can certainly have an indirect impact on your body's energy levels and, consequently, your activity and metabolism
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Monograph: Bacteriostatic Water for Injection
B12 supports normal energy metabolism and red blood cell production, so correcting a genuine deficiency can help you feel and perform like yourself again, but shots are not a proven performance enhancer for people who are not deficient
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