![](https://wp02-media.cdn.ihealthspot.com/wp-content/uploads/sites/97/2017/12/ketones-300x200.jpg)
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Every rider who drank the ketone supplement performed worse than others who did not.
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Those riders’ times were about two percent slower and power output was almost four percent less.
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Some form of gastrointestinal upset (vomiting, nausea, dry retching) was reported by each rider who drank the ketone supplement.