Shutterstock The keto diet is a popular strategy for rapid weight loss and can help with certain medical conditions like seizures and Type 2 diabetes. But kidney doctors say if you're not careful, it can be a recipe for kidney stones and other health concerns. It's not the diet itself that's necessarily bad, but the way some people approach it. Make sure you're staying hydrated, and keep your intake of meats in check. The keto diet, at its essence, is rather straightforward: stop eating carbs, munch on more fat.