The food eaten will be digested and absorbed by the spleen and stomach, detoxified by the liver, absorbed nutrition and eliminated dross.
If the food you eat contains too many harmful substances such as preservatives and additives, it will increase the burden on the liver and affect the function of the liver over time.
The food you eat will enter different meridians, such as white things entering the lung meridian, black food entering the kidney meridian and so on. Nutrition entering each meridian will nourish and supplement the meridian.
Of course, physical health is also related to mood, environment and other factors, but the impact of diet health on people's health is the most direct impact.