In fact, human ancestors mainly ate meat, but with the improvement of evolution and productivity, the demand for high-calorie meat food decreased. Besides being delicious and satisfying appetite, meat can also provide enough protein, vitamin B, iron (to prevent anemia), zinc, vitamins A and D, etc. Fish and shellfish aquatic products are rich in protein, zinc, vitamin D, DHA and EPA, and it is ok to eat 1 ~ 1.5 kg per week. Especially pregnant women, nursing mothers and children should eat more fish and aquatic products.
The total amount of aquatic products and livestock and poultry meat per week for adults should not exceed 1kg. These foods should be eaten every meal every day, avoiding eating too much meat at one meal, and trying to eat an egg every day to achieve protein complementarity. Fish and poultry have relatively low fat content, and aquatic products also contain more unsaturated fatty acids. It is suggested that aquatic products and poultry should be given priority. Red meat such as pork and beef can not only provide protein, but also provide some iron, which is an important way to supplement iron in daily diet. At the same time, animal viscera, such as liver, can be eaten properly to achieve the effect of iron supplementation.
Eating meat and health, some fat-soluble vitamins A, D and E must be dissolved in fatty foods before they can be absorbed and utilized by the human body. If you don't eat fat and only eat vitamins, it is easy to cause various vitamin deficiencies. Lack of vitamin A can lead to dry and rough skin, yellow and dry hair, increased scales, uneven nails, corneal softening and night blindness.