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Vitamin B12 (cobalamin) is an absolutely essential nutrient that our bodies cannot produce on their own
10.1271/bbb.130151 Biosci
Although this nutrient is found in animal products, many still have trouble meeting their daily requirements
A vitamin B12 deficiency can cause extreme fatigue, among other symptoms, and leave individuals feeling weak and foggy
Neurosci Lett (2009) 465(1):615.10.1016/j.neulet.2009.08.081 58 HartungJEEskewOWongTTchivilevaIEOladosuFAOBuckleySCet alNuclear factor-kappa B regulates pain and COMT expression in a rodent model of inflammation
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