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Vitamin B12 helps to utilize fats and carbohydrates for energy and make new proteins
As with any substance, athletes subject to anti-doping rules should confirm current status with their governing body and maintain documentation for any approved use
A recent systematic review indicated that while reductions in fat mass and visceral adipose tissue are generally consistent in obese or overweight adults, changes in lean mass are variable, showing decreases, preservation, or increases [49]
Proc Natl Acad Sci U S A 101:97749
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