[2] [6] In healthy adults, vitamin B 12 deficiency is not common, mainly because body stores of the vitamin are substantial and turnover is slow, with relatively low dietary requirements
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Panel members with backgrounds in academia, rather than peptides, mostly voted against the substances, which are widely advertised on social media
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ScientificAmerican.com
However, only 22% of the variation in MMA levels was explained by vitamin B12, estimated glomerular filtration rate, age, sex, and socioeconomic status, suggesting that other underlying disease was likely the reason for elevated MMA levels