It can result from dietary factors, medication use, and some underlying conditions
Because the body does not produce B12 naturally, maintaining healthy levels through diet or supplementation is essential
beta-Thymosins, small acidic peptides with multiple functions
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B12 prevents megaloblastic anaemia by enabling normal red blood cell formation in bone marrow The vitamin maintains myelin sheaths around nerve fibres, protecting against potentially irreversible neurological damage B12 works with folate in DNA synthesis and metabolises homocysteine, though supplementation does not reduce cardiovascular events Deficiency causes fatigue, paraesthesia, cognitive problems, and requires prompt treatment when neurological symptoms present Those with pernicious anaemia or malabsorption require lifelong hydroxocobalamin injections rather than oral supplements Vegans, older adults, and those taking metformin or proton pump inhibitors face increased deficiency risk Table of Contents What Does Vitamin B12 Do in Your Body