There is no such thing as the best thing to eat for the elderly with chronic illnesses, but you can choose Chinese medicine and food according to your own condition. The elderly with chronic illnesses will show different symptoms such as spleen and stomach deficiency, kidney deficiency, qi and blood deficiency, qi and yin deficiency, and so on. After identifying the symptoms under the guidance of a doctor, choose medicines to tonify qi and blood, qi and yin, spleen and kidney to regulate. For patients who are deficient but the symptoms are not particularly serious, they can be regulated through dietary therapy according to their conditions. For example, people with insufficient qi and blood can usually eat more jujubes, beef and lamb, pork, etc., and the effect is also very good through the method of dietary therapy. The symptoms and conditions of the long illness of the elderly are different, under the guidance of a doctor to identify and then choose the appropriate method of conditioning is the best. Through dietary therapy, drugs and other methods at the same time, to achieve a better therapeutic effect.