Azerbaijan National Academy of Sciences

Vitamin B3, also called nicotinic acid or niacin, is the precursor to nicotinamide adenine dinucleotide (NAD) -- vital to metabolism and a key to the development of ancient life. And though its possible B3 developed non-biologically on ancient Earth, scientists say it's likely carbon-rich meteorites peppering the planet millions of years ago offered an extra dose of niacin.

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