Ham contains a certain amount of protein, fat, vitamins and minerals and other nutrients, can provide the body with a certain amount of nutrients and energy, but ham contains sodium nitrite, a large amount of consumption can cause acute poisoning, long-term consumption of cancer risk. 1.Nutritional value: every 100g of ham can provide energy 1369KJ, protein 16.0g, fat 27.4g, vitamin A46μg, niacin 0.00860g, cholesterol 0.12g, sodium 1.0867g, but also contains a certain amount of potassium, phosphorus and other minerals, moderate consumption of ham can be supplemented with nutrients and energy needed by the body to maintain normal physiological functions. 2. Contraindication: ham is smoked products, containing a certain amount of sodium nitrite, sodium nitrite has a coloring and preservative effect, but the human body has toxic side effects, can paralyze the vasomotor center, respiratory center and peripheral blood vessels, the formation of high iron hemoglobin, if a large number of food may cause acute poisoning, long-term consumption of carcinogenic risk. In addition, ham in the sodium content is very high, if the intake of sodium will cause excessive sodium retention in the body, resulting in increased blood pressure, so patients with high blood pressure should be careful to eat, or else cause blood pressure to continue to rise, increasing the risk of atherosclerosis and other diseases. Although ham is delicious and contains certain nutritional value, but should be eaten in moderation, a large number of long-term consumption will be detrimental to health.