A drink developed for soldiers to generate energy from ketones rather than carbs or fat allowed highly trained cyclists to add up to 400 meters of distance to their workouts, a UK-led study reports July 27 in Cell Metabolism. The supplement, which will be commercially available within the year, works by temporarily switching the primary source of cellular energy from glucose or fat to ketones—molecules derived from fat that are known to be elevated in people consuming a low-carb, Atkins-like diet.
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