Vegetarian and ketogenic diets have been studied extensively for their health benefits. The ketogenic, or keto, diet is a high-fat, low-carb diet that has become especially popular in recent years. Although it usually contains animal products like meat, fish, and poultry, it’s possible to adapt it to fit a vegetarian diet. The vegetarian keto diet is an eating plan that combines aspects of vegetarianism and keto dieting. Most vegetarians eat animal products like eggs and dairy but avoid meat