Longevity Principle: according to the ancient TCM textbook, the “Yellow Emperor's Classic of Internal Medicine”, we should nourish the Yin during the autumn and winter seasons.
Other than paying attention to exercise and keeping warm (such as walking, jogging, and keep warm in order to prevent the occurrence of respiratory diseases), one should also modify their diet to be “nourishing tonics”, so we could "Tonify the Kidney to fortify against the Cold Evil."
After spring, summer, and autumn seasons, the accumulated consumption of the internal organs’ energy tense to lead to partial deficiency of both Yin and Yang. Thus reasonable tonic can replenish the blood fluid against the Cold invasion of this year and the next.
Recommended diet: the consumption of foods such as lamb, chicken, walnut, Chinese jujube, longan fruit, yam, lotus seed, lily bulb, and chestnut has the functions to tonify the Spleen and Stomach, warms the Kidney Yang, tonify the Spleen to dissolve Phlegm, and tonify the Lungs to stop couch. Those with body constitutions consider being more hot and in excess should not eat these foods in excess. And as a general rule, avoid all cold foods, such as ice cream and cold raw foods.