recent British study found that pregnant women easily lead to excessive consumption of animal liver vitamin A levels reached endanger the fetus , and may have teratogenic effects.
British scholar through some deformity children , including ear defects , craniofacial morphological abnormalities , cleft lip , cleft palate and eye defects , nervous system defects and thymic hypoplasia in children survey and found that the prevalence of pregnant women were associated with excessive consumption of animal liver-related . Meanwhile , animal experiments also suggest : If feeding livestock when vitamin A, the unborn fetus potentially harm. U.S. Centers for Disease Control found that pregnant women take a lot of vitamin A prone fetal MBT malformations. The United States has reported one case of pregnant women eat animal liver cases of congenital malformations in infants .
Therefore , in recent years the British government warned pregnant women in the diet to reduce or remove the liver and liver products. Because pregnant women, excessive consumption of animal liver, will lead to excessive intake of vitamin A , can easily exceed the requirements of pregnant women .
Pregnant women should not eat liverthe nike free past, people have advocated a diet of pregnant women must be included in animal liver , because the liver is rich in vitamins and trace elements that are essential for maternal diet food . However, excessive consumption of animal liver , can lead to side effects.
experts recommend that pregnant women MBT Sko reduce the consumption of animal liver is best to occasionally eat once a suitable , each controlled at 30-50 grams. As animal liver contains rich vitamin A, B and zinc , etc., can be obtained from other foods . For example , fresh vegetables , and fruits. Because carrots , spinach, cabbage and oranges contain carotene and other can be transformed into vitamin A. In addition, from the fish, lean meat supplement B vitamins and trace elements such as zinc .