Nuts and Seed - Nuts and seeds are high in healthy fats and protein and they make for some of the best keto snacks. If you are going to have some carbs, it’s best to opt for whole foods in their natural form. When balancing the carbs in certain fruits, its best to stick to low carb fats and proteins. Not only are strawberries and watermelon wildly popular fruits but they’re low carb too! Now, there are only 11.