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For individuals with mild deficiencies or as a maintenance option after injections, oral B12 supplements or sublingual B12 formulations may be suitable alternatives
mass-spectrometric identity and, where relevant, disulfide confirmation
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You should tailor a B12 supplement to meet your needs and not overdo it because the liver stores B12, and the kidneys send excess vitamin B12 out through urine
Split doses (morning and evening) maintain more stable levels for intensive protocols
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