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According to research conducted in 2008, the body only absorbs about 1.3% of a 1,000 mcg oral dose of B12
It is not for human or veterinary use, and must not be used in food, drugs, diagnostics, therapeutics, or cosmetics
In some cases, the physician might recommend these vitamin supplements for patients having trouble absorbing vitamin B12 through food
For this reason, medications that are often broken down in the digestive tract can reach their target tissues while remaining intact
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