Cold and cool are the same in nature, but in different degrees. Cold foods help to clear fire and detoxify the body, and can be used to assist in the treatment of fire-heat illnesses. Where the red face and eyes, madness, fainting delirium, neck straightening, mouth and tongue erosion, gum swelling and pain, dry mouth and thirst, like cold drinks, short red urine, stool dryness, red tongue, yellow and dry, pulse number of real fire disease, can be used as raw materials for cooking and eating, help to clear the fire and dispel the disease.

The first thing to say about diet is "sex". "Sex" (or "gas") means that food is cold, cool, warm, hot and other different properties, known as the Chinese medicine "four sex" or "four gas ".

Cool or cold Any food that applies to a hot body and disease is cool or cold food. For example, watermelon, which is suitable for fever, thirst, irritability and other symptoms; pear, which is suitable for cough, chest pain, phlegm and other symptoms, all belong to the cold nature of the food.

Warm or hot and cool or cold on the contrary, where applicable to cold body and disease food, belong to warm or hot food. For example, ginger, scallion, cilantro for cold and flu, fever, chills, runny nose, headache, etc.; dry ginger, black tea for abdominal pain, vomiting, like hot drinks, etc.; chili pepper, wine for cold limbs, fear of cold, rheumatic arthralgia, etc., are all warm and hot nature of the food.

The nature of the flat nature of the food between the cold and warm nature of the food, suitable for the general body, cold, hot disease can be used. The flat food is mostly for general nutrition and health care products. Such as rice, noodles, soybeans, yams, radishes, apples, milk and so on.

From generations of traditional Chinese medicine dietary therapy books recorded more than 300 kinds of common food analysis, flat food mostly; warm, hot sex second; cold, cool sex after. Generally speaking, a variety of nature of the food in addition to all have nutritional health effects, cold food belongs to the yin, heat, diarrhea, cool blood, detoxification, etc.; warm food belongs to the yang, there are dispersal of cold, warming the meridians, through the channels, help Yang and other effects.