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10.1016/s0305-4179(03)00004-4 122 SikiricP.SeiwerthS.RucmanR.DrmicD.StupnisekM.KokotA.et al (2017)
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Most adults looking to boost their metabolism, burn fat, and increase energy levels are good candidates
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However, understanding safety data in context remains essential
Another study conducted by the University of California found that B12 supplements improved energy levels and reduced fatigue in individuals with chronic fatigue syndrome
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