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[DOI] [PubMed] [Google Scholar] 70.Hong HS, Lee J, Lee E, et al

The gut microbiota aids in breaking down complex food components, synthesizing vitamins and short-chain fatty acids, and regulating immune responses

If you have a B12 deficiency, correcting it with Cyanocobalamin can improve symptoms like fatigue and weakness, which may make you feel more energetic

On the one hand, they are vital for normal cellular functions
