Keto Advantage Keto Burn Reviews :“Some people report that when they start ketosis, they just feel sick,” says Kristen Kizer, RD, a nutritionist at Houston Methodist Medical Center. “There can sometimes be vomit, gastrointestinal distress, a lot of fatigue, and lethargy.” This so-called keto flu usually passes after a few days, she adds. But as a general weight-loss plan, keto is more controversial. Some health experts warn against it entirely, citing unpleasant side effects, health risks, and the diet’s unsustainable nature.
You’d want to try it only with a doctor or dietitian’s supervision, he says. The name refers to a specific type of energy-carrying molecule, called a ketone. “Most people are always in a state of glucosis, meaning they’re burning glucose from carbohydrates for energy,” Westman says.