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doi:10.1016/j.stemcr.2015.04.001
No human pharmacokinetic data exists to confirm whether these doses translate to effective systemic exposure
While its prescribed for medical conditions, using it for muscle growth is considered off-label and may be subject to stricter laws
Heres what well cover in this blog post: Why blood B12 levels rise with supplementation The safety of high B12 levels in healthy individuals When elevated B12 may require further investigation The medical consensus on B12 supplementation and safety Why Do Blood Levels of B12 Rise with Supplementation
PubMed 28
Are B12 Injections Better Than Supplements
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