Ham is a post-processed cured or smoked food that is carcinogenic. Moderate consumption can supply the body with energy, protein, fat and other nutritional values. However, it does not have the efficacy of medicine. Ham is cured or smoked pork leg. Ham contains a relatively high content of nitrite, and the production process has a certain relationship, and nitrite has a certain carcinogenicity. In addition to nitrites, ham may contain many preservatives, which are also very bad for the body. Ham contains very high calories, moderate consumption can supplement the body’s caloric needs. Each 100 grams of ham contains 330 kcal of energy, 16 grams of protein, 27.4 grams of fat and 4.9 grams of carbohydrates. Ham is a post-processed food and is carcinogenic, so excessive consumption is generally not recommended.