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Age-related NAD+ decline impairs this critical DNA repair pathway CD38 balance: The ectoenzyme CD38 consumes NAD+ and increases with age, creating a vicious cycle of NAD+ depletion and immune dysregulation By restoring NAD+ levels, supplementation recalibrates multiple aging pathways simultaneously: improved DNA repair, enhanced mitochondrial biogenesis, restored epigenetic regulation, activated autophagy, and improved nutrient sensing

Our results show a statistically significant effect size for deaths in social proximity on OODs in counties in the United States, controlling for spatial proximity, as well as demographic and clinical covariates

doi: 10.1038/s41588-019-0350-x 175 SaxenaS.KruysV.De JonghR.VamecqJ.MazeM

2) were intermediate to large, thus explaining 9 to 25% of the variance 31