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A 2021 systematic review of 16 randomized controlled trials and 6,276 participants (Markun and colleagues, Effects of Vitamin B12 Supplementation on Cognitive Function, Depressive Symptoms, and Fatigue, Nutrients, 2021) found that B12 supplementation does not reliably reduce fatigue in people who are not deficient
Supplied at 99%+ HPLC purity with a batch-specific Certificate of Analysis (COA) confirming purity by HPLC and identity by mass spectrometry for your exact lot
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Its natural presence in the body contributes to its perceived safety profile
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