Controversial supplement helped to slow aging and extend lifespan in cells from humans with a rare aging syndrome that kills sufferers before the age of 45, study says

A controversial anti-aging supplement appeared to slow aging in cells with a rare condition that accelerates aging and kills sufferers by the age of 45.

NAD+ is a pill designed to boost our levels of a molecule called NAD (nicotinamide adenine dinucleotide), which is abundant in children, fuels metabolism, and seems to keep cells fresh.

In the past decade, there has been a flurry of excitement over NAD+, with scores of scientists claiming to have evidence that NAD+ slows aging in animals by fueling new cell creation, and just as many critics saying the evidence is weak.

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