Natural fat, high-fat sauces – Most of the calories on a keto diet should come from fat. You’ll likely get much of it from natural sources like meat, fish, eggs, and other sources. But also use fat in cooking, like butter or coconut oil, and feel free to add plenty of olive oil to salads and vegetables. You can also eat delicious high-fat sauces, including Bearnaise sauce, garlic butter, and others . If you're no longer losing weight or following the keto diet, it could be time to go off it.