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B12 shots are not likely to increase energy or exercise performance in people who already have normal B12 levels
Prescription medication only available if prescribed after an online consultation with a healthcare provider
Many people dont consume enough Vitamin B12 in their diet, particularly vegetarians and vegans due to B12 being found naturally in animal products such as meat, fish, milk, and eggs
Only a small share of a large oral dose is absorbed by the bodys usual receptor-based route, but the surplus crossing the gut wall by simple diffusion is still enough to lift a serum reading well above the reference range
Vitamin B 12 is bound to intrinsic factor during transit through the stomach
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