Can we assume that the benefits of a ketogenic diet for endurance athletes, particularly cyclists, outweigh the risks of dehydration, or is this a case of robbing Peter to pay Paul? The scientific consensus seems to be that keto-induced dehydration is a real concern, but what about the athletes who claim to have adapted to the diet and no longer experience dehydration issues? Is this adaptation a result of physiological changes, or is it simply a matter of individual variability in response to the diet? Furthermore, how do we quantify the impact of keto-induced dehydration on cycling efficiency, and what are the most effective strategies for mitigating its effects?