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The metabolism and elimination of NAD+ (and its by-products) could be altered in advanced hepatic or renal dysfunction, and high-dose NAD+ might theoretically affect cardiovascular dynamics, so practitioners generally avoid or closely supervise NAD+ use in such settings

There is no recommended maximum

The methodological quality of the included studies, as assessed through the Jadad and NewcastleOttawa scales, varied from moderate to high, while the GRADE assessment indicated moderate certainty of evidence for serum vitamin B12 increase and low certainty for homocysteine reduction

Essential for Pregnant Women and Fetal Development Vitamin B12 is especially important for pregnant women, as it plays a critical role in fetal development, particularly in the formation of the brain and nervous system