First of all, it is problematic to eat foods with high protein, low carbon, low water and low calorie for fitness. Generally speaking, people who exercise, including those who want to lose weight through exercise, should have a high-protein diet, but a low-carbohydrate diet is not recommended. As for a low-calorie diet, it is not recommended unless you need to lose fat quickly.

Carbohydrates are very important for exercise and health. Carbohydrate is the source of carbohydrate stored in the body. Low carbohydrate diet will directly lead to the decrease of muscle glycogen and liver glycogen storage, which will lead to the decrease of exercise ability. If you consider gaining muscle, carbohydrates are even more indispensable. Low-carbon water diet itself will increase muscle consumption because it can't stabilize blood sugar. Low-carbon water diet combined with exercise is even worse.

As for what is high-protein food, generally speaking, if the protein per100g of food exceeds10g, it can be regarded as high-protein food. Meat, eggs and beans generally meet this standard. Oat protein can reach 15g per 100g, which is also a high protein food.

There is no clear standard for low-carbon water and low-calorie food.