From the nutritional point of view, onion is rich in carotene, vitamin C, edible fiber, low in calories, and it has many therapeutic effects when blown to the big. Soybean sauce is rich in protein, vitamins and minerals. They can complement each other, but when they are eaten in large quantities, they consume a lot of salt, which is not a pure healthy food. The statement that "healthy food makes the brain secrete dopamine" can't explain the function of chocolate and fried food.