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Physicians and providers must document medical necessity in the medical record, since proper billing, coverage, and reimbursement depend on accurate coding information
However, research performed by doctors explains that when people can properly absorb and store vitamin B12, it is stored within the body for between 3 to 5 years
Formulated and tested for purity by U.S.-licensed pharmacies
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People who eat animal products can still obtain B12 through their diet but it is harder for vegetarians and vegans
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