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Certain studies, such as those involving control room operators and refinery workers, report no significant differences in antioxidant enzymes (i.e., CAT and TTG), TAC, or lipid peroxidation markers (i.e., MDA) in correlation with NSW, although a borderline increase in OSI was noted in rotating NS healthcare workers 80,81,82

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10.26434/chemrxiv.13606034.v1 59 HussainY.AlamW.UllahH.DacremaM.DagliaM.KhanH.et al (2022)

It's important to note that while NR is generally recognized as a dietary supplement in the US, the FDA has indicated that NMN is excluded from the dietary supplement definition