Doctors (first of all, Chinese medicine) mainly diagnose and adjust diseases from the human body, so that the human body can get a balance, but usually they don't guide people how to adjust their habits and achieve a long-term balance. Doctors in western medicine are more direct. Where there are abnormalities, they use drugs to eliminate symptoms, or directly start the disease, which is very direct, but it can't eradicate most diseases (pulmonary bacterial diseases).
Nutrition refers to the school of western medicine. His main point of view comes from the micro, that is, to analyze what substances the human body lacks from the molecular point of view, and then increase the consumption of such substances (just eating, not ingesting the human body), regardless of the internal environmental changes and environmental changes in the human body. I usually eat a lot, but what my body needs is still lacking.