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It is not known whether calcium supplementation can reverse vitamin B 12 malabsorption
However, research suggests there may be a connection between low B12 and how the body produces and regulates male sex hormones
The USDA (United States Department of Agriculture) lists New Zealand-imported beef as the highest vitamin B12 source, with 95.5 micrograms per four-ounce serving
3 No reference is made to the serum value or a danger of overdosing, unlike for instance in case of a vitamin D or A deficiency
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