Vitamin B
4 is a former designation given to several distinct chemical compounds, none of which is currently considered a true
vitamin:
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Adenine
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Carnitine
Carnitine is a quaternary ammonium compound involved in metabolism in most mammals, plants, and some bacteria. In support of energy metabolism, carnitine transports long-chain fatty acids into mitochondria to be oxidized for energy production, an ...
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Choline
{{chemistry index, Vitamin B
4