The best NAD+ supplements have quickly become wellness essentials, promising everything from enhanced energy production and visibly improved skin health to extended life span. In a world obsessed with the latest anti-aging breakthroughs, nicotinamide adenine dinucleotide (NAD+)—also dubbed the “fountain of youth” in biochemical circles—is having a major moment. No matter the form it’s delivered in, NAD+ boosters are designed to increase NAD levels in the body and address a full spectrum of age-related concerns: think brain fog, sagging skin, muscle loss, and the slow unraveling of your metabolic vitality.

“NAD+ supports virtually every major cellular function,” board-certified internist and longevity expert Dr. Amanda Kahn tells Vogue . “It helps your cells generate ATP (energy), pr

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