why do bodybuilders inject b12 Super-B12 Complex Inj STEVE REEVES TOOK VITAMIN B12

Baseline serum B12, methylmalonic acid, and homocysteine testing are essential to establish whether B12 supplementation is medically indicated and to monitor response

In liquid dietary supplements, B12 is in free form, and is easily exposed and degraded by vitamin C. They cite Yamada 2004, which I havent been able to track down

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While not required, a calorie deficit with adequate protein (0.7 to 1.0 grams per pound of goal weight) produces best results

However, in another study reporting administration of NR or the CD38 inhibitor GSK987A to mdx mice for 20 weeks 267 , treated mice with the CD38 inhibitor showed increased NAD + levels in muscle tissue, but no improvement was found in muscle function after treatment with either the inhibitor or with NR