Eating well and eating a lot every day may not be the same as adequate nutrition. The diet must be diverse and must pay attention to nutritional balance in order to do so. So, how do you know if your body is lacking in nutrition? These signals of the body can tell you the answer. 1, symptoms: tongue inflammation, tongue fissures, tongue edema may lack of nutrition is B vitamins. Nutrition countermeasures: washing rice, steaming rice, etc. can cause a large loss of B vitamins. Long-term consumption of fine rice and noodles, long-term vegetarian diet, while there is no other supplement, it is easy to cause the lack of B vitamins. For this reason, the main food should be coarse and fine, meat and vegetarian mix. If you have the habit of eating vegetarian, you should supplement a certain amount of B-complex vitamin pharmaceutical preparations daily. 2. Symptom: The nutrition that may be deficient in reduced vision at night is vitamin A. Nutritional countermeasures: Increase the intake of foods such as carrots and pig liver. Both provide vitamin A in plant and animal form, respectively, with the latter being absorbed more efficiently. It should be noted that vitamin A is a vitamin that dissolves in fat but not in water, so cooking fried carrots in vegetable oil can be much more efficient in absorbing vitamin A than eating them raw. 3, symptoms: dry and cracked corners of the mouth may lack of nutrition is riboflavin (vitamin B1) and niacin. Nutritional countermeasures: riboflavin (vitamin B1) varies greatly in content in different foods. Animal liver, egg yolk and milk are richer. For this reason, it should be supplemented once a week (2~3 taels) with pork liver, 250 ml of milk and an egg daily. 4, symptoms: loss of taste may lack of nutrition is zinc. Nutritional countermeasures: moderate increase in shellfish, such as oysters, scallops, etc., is an effective means of supplementing trace elements of zinc. In addition, ensuring 1 egg, 3 taels of red meat and 1 tael of beans daily is also necessary to replenish the trace element zinc. 5. Symptom: The nutrition that may be lacking in bleeding gums is vitamin C. Nutritional countermeasure: Vitamin C is the most deficient vitamin because it requires harsher living conditions, and light, temperature, storage and cooking methods can all cause damage or loss of vitamin C. Therefore, a large amount of fresh vegetables and fruits should be consumed daily, it is best to consume about 1500 grams of vegetables and 2~3 fruits, of which, the cooking method of vegetables is better to combine hot stir-fry and cold salad.