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But unless you have a vitamin B12 deficiency, vitamin B12 injections aren't likely to give you an energy boost." Ironically, the National Institutes of Health says that symptoms of B12 deficiency include loss of appetite and weight loss
Jordan M
1 2 "Dorothy Mary Crowfoot Hodgkin, 12 May 1910 29 July 1994"
The most common causes include B12 supplementation (particularly injections), liver disease releasing stored B12, haematological disorders increasing B12-binding proteins, and chronic kidney disease reducing B12 excretion
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