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NAD⁺ is a coenzyme present in all living cells, playing a crucial role in various biological processes. It is essential for DNA repair, regulating inflammation, and maintaining mitochondrial function. However, research indicates that NAD⁺ levels diminish as we age, contributing to cellular damage and the aging process. Therefore, scientists hypothesize that increasing NAD⁺ levels could counteract some effects of aging, prompting extensive research on the topic.