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The Institute of Medicine has not established a tolerable upper intake level of B12 because studies show no adverse health effects when taking excess levels of B12, either through food or supplements
Accelerated DNA Repair: It activates sirtuins to help your cells repair damage from stressors
(PubMed) Williams AL, Girard C, Jui D, Sabina A, Katz DL
Not an underlying health issue
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