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One of the arguments for this is that NAD is a large molecule that's not as easily absorbed in the body, so taking smaller compounds and allowing the body to convert them once they're absorbed might actually raise be more efficient in terms of how much NAD+ you get but there's still no definitive answer to which method works best, so what's the difference in dosages if you're taking an NAD precursor

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[DOI] [PubMed] [Google Scholar] 218.Marks W.J., Jr., Bartus R.T., Siffert J., Davis C.S., Lozano A., Boulis N., Vitek J., Stacy M., Turner D., Verhagen L., et al

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