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This review highlights NAD+ as a central regulator of energy metabolism, mitochondrial function, and cellular repair, demonstrating that age-related declines in NAD+ may contribute to chronic disease, while supplementation with NAD+ boosters shows potential for reducing age-related decline and disease

This approach mirrors how anti-obesity medications are used in clinical practice, where long-term maintenance therapy prevents weight regain

However, one of the most common is vitamin B12 deficiency

In laboratory studies, inhibiting NNMT has been investigated for effects on cellular NAD+ levels and adipocyte (fat-cell) metabolism