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Certain populations face higher deficiency risk: vegetarians and vegans (B12 is primarily found in animal products), adults over 50 (decreased stomach acid reduces B12 absorption), individuals with digestive disorders like Crohn's disease or celiac disease, and those taking medications like metformin or proton pump inhibitors

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Regulatory and Legal Challenges The evolving regulatory landscape creates ongoing challenges for healthcare providers and patients

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(2023, November 22)

Some researchers have studied vitamin B12 to find out if it can increase energy and endurance during exercise, but the results are inconclusive