Qi is depleted through the stressors of daily living. Qi is obtained from air and food. Qi becomes deficient through bad eating and drinking habits, lifestyle, attitude, irregular breathing. If Qi is not sufficiently maintained disease will result. Qi deficiency can be precipitated by environmental stressors, toxic emotions, prolonged exposure to extreme climate, and lifestyle.
Nutrition is a functional aspect of health.
The connection between diet and health is considered vital. Certain foods have specific Qi functions, they heat or cool, or stimulate or sedate. Disease is the result of not living in accord with natural laws of the universe, including that which is obtained through diet either in excess or not enough of. When the natural processes of the body and Qi is balanced, good health can be maintained.