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2012 Sep 1;22(5):397-402

Research in preclinical models has explored its role in NNMT inhibition, NAD+ metabolism, and cellular energetics (pmc.ncbi.nlm.nih.gov, pubmed.ncbi.nlm.nih.gov)

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Wainwright P, Narayanan S, Cook P Clinical biochemistry 2015

In contrast, wounds treated with zinc oxide and control wounds remained clean and free of exudate throughout the study, with granulation tissue formation being less remarkable in these groups on days 7 and 8

Despite this enormous market and constant innovation, many supplements produce little measurable biological effect inside the body