A keto diet plan is built around consuming foods with high levels of proteins and healthy fats, as well as other low carb foods such as fresh vegetables. Those who are on a keto diet avoid foods such as grains and starches that are high in carbohydrates as well as sweets and candy. Many people try the keto diet in order to drop weight since the idea behind this diet is for the body to burn fat instead of relying on carbs and sugars from food.