It helps produce red blood cells, supports nerve function, and prevents B12 deficiency symptoms such as fatigue, weakness, and numbness in the hands or feet
So one ingredient supplies NAD+, and another is thought to stop the body from wasting it
Using the FDA's body-surface-area conversion, a 10 mcg/kg rat dose maps to roughly 1.6 mcg/kg in a human, but most practitioners use higher doses based on clinical experience

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