Keto Slim X Reviews: People with complicated food and social histories may have a hard time sticking with it. Be sure to let your own primary care physician know you're planning to go on a keto diet. A ketogenic diet is a very low-carb diet with numerous health benefits. Here are 16 healthy and nutritious foods you can eat on this diet. Besides fitting the keto profile, natural peanut butter is nutrient-dense and packed with healthy fats, protein, antioxidants, vitamins, and minerals. It’s also loaded with dietary fiber — a nutrient that is sometimes inadequate on a keto diet.