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Circadian variation affects baseline measurements

This is known as hypercobalaminemia

Outside that pathway, it is commonly sold as an unregulated "research chemical" labeled not for human consumption, with no pharmaceutical oversight of purity or dosing

The mechanism is likely related to reduced caloric intake and metabolic adjustment rather than a direct drug effect

This dramatic evidence gap defines the current landscape and shapes how we should interpret both the promising preclinical data and the abundant anecdotal reports

By midlife, NAD+ can drop by 50%, exacerbated by inflammation and lifestyle.[14] Factors like poor diet, sedentary behavior, or chronic stress further deplete NAD+ by activating consuming enzymes, creating a vicious cycle