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Once supplementation stops, B12 levels typically return to the normal range within a few months

10.1186/s40249-018-0433-4

Further investigation understanding the landscape of NAD + in response to diseases and identifying the specific effector molecules for each NAD + precursors at different time points provide critical insights into development of effective interventions for various physiologies

The body then eliminates the destroyed cells through a natural elimination process

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(Note: The provided link actually points to a study on prostate cancer)