Unlike some vitamins, B12 is absorbed through the digestive system, which means some people struggle to absorb enough from food alone
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Alternative Therapies in Health and Medicine, 27 (4), 813
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
, 5 , 181, doi: Lu, S
Betaine alleviates nonalcoholic fatty liver disease (NAFLD) via a manner involving BHMT/FTO/m(6)A/ PGC1 signaling