Feeling constantly tired and lethargic can indicate a lack of vitamin B12
Are there any Precautions and Drug interactions for Vitamin B12 Injection
Some dietary supplements may contain a very high concentration of B vitamins
4,5 Dietary insufficiency, pernicious anemia (i.e., an autoimmune process that reduces available intrinsic factor and subsequent absorption of vitamin B 12 1,2,6,7 ), and long-term use of metformin or acid-suppressing medications have been implicated in B 12 deficiency
A 2021 study published in Cell Metabolism found that inhibiting nicotinamide N-methyltransferase (NNMT)
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