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Description
Effects of insulin-like growth factor-I on glucose tolerance, insulin levels, and insulin secretion

[DOI] [PMC free article] [PubMed] [Google Scholar] 49.Walker AK, et al
Key dietary sources of B12 include: Meat Eggs Dairy products Fortified breakfast cereals Other fortified foods These foods provide B12 naturally or are fortified during processing to help prevent dietary deficiencies

Most experienced researchers settle on 300-500mcg as the optimal daily dose

(5) Why Are B12 Supplements Recommended to People
