Lactate has long been blamed for muscle burn, fatigue, and declining performance. Now, some athletes are consuming it as a potential fuel source. Alex and Dr Tim Podlogar break down what lactate actually does in the body, why it is not simply a waste product, and whether the latest performance claims are supported by science. They also explore the potential problems with lactate supplementation, from gastrointestinal issues to questionable benefits when carbohydrate intake is already high.