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Maintenance / Long-Term Research Protocol Amount: 200300mcg Frequency: 35 days weekly Duration: Variable depending on research design Research Notes Lower-frequency protocols are sometimes investigated in maintenance-focused research protocols
PDP publishes these numbers to document and compare research protocols
Research suggests methylcobalamin stays in the body longer while cyanocobalamin may be more easily absorbed, but other studies have found little difference in the two in absorption and retention
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