Study Debunks Athletes' Belief in Ketone Drinks' Performance Benefits.

A new study has found that ketone drinks, a popular sports supplement that promises to improve athletic performance, did not amplify recreational cyclists' racing speed and instead left them performing worse after swallowing the beverage than after a placebo. The study also found that the ketone drink caused stomach and intestinal problems in most of the riders. While ketone drinks could still prove useful in other sporting contexts, more research is needed before making recommendations about any possible, limited sporting uses of ketone supplements.