These foods are easy to make and low in carbs, which make them an ideal food for the keto diet. Keto Now Reviews And if you’re following the diet for weight loss, it's important to know that you may gain weight back when and if you go back to your normal eating habits. “A lot of patients find that when they come off the diet, they regain weight very easily,” she says. The keto diet is literally a fat-burning diet, since it puts your body into a metabolic state called ketosis. That means your body’s main fuel source switches from carbohydrates to fat.