Skin egg, also known as puffy egg, will not be fattened when consumed in small amount, and the heat generated by 100g of puffy egg made of egg is 178kcal. 14.8g of protein, 10.6g of fat, 5.8g of carbohydrates, it is also rich in vitamin A, vitamin E and iron, and the content of cholesterol is 595mg. 100g of puffy egg made of duck egg has 171kcal of energy, 14.2g of protein, 10.7g of fat, 4.5g of carbohydrates, and 542.7mg of sodium. Leather eggs contain more lead, which has a certain impact on the development of the nervous system and should be consumed less by children during their growth and development, and their high sodium content has a heavy burden on hypertension and kidneys, so it is not recommended for long-term consumption by the elderly and not recommended for long-term consumption in large quantities. Eggs produce less heat than starchy compounds, so a small amount of consumption will not cause obesity.