Lack of vitamin A can cause dry eye, which is an eye manifestation of systemic malnutrition and vitamin A deficiency. Adult vitamin A deficiency is occasionally seen in patients with severe gastrointestinal digestive diseases, vitamin A malabsorption, liver and lung diseases (such as cirrhosis and advanced liver cancer). Due to severe liver function damage, fat malabsorption leads to fat-soluble vitamin A deficiency.
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The role of vitamin A is to promote growth and maintain normal vision of human eyes. Because vitamin A is a fat-soluble vitamin, excessive intake will increase the burden on the liver. It is not recommended to take vitamin A tablets, but to supplement them from food.
Foods rich in vitamin A alcohol mainly include animal liver, milk, eggs and fish oil. Foods rich in β -carotene mainly include carrots, green leafy vegetables, pumpkins, watermelons, Chinese cabbage, persimmons, apricots, corn and so on.
The main reason of vitamin A deficiency is the high consumption and low intake of vitamin A in the body. It is more common in infants who are improperly artificially fed, and malabsorption or consumptive dysentery such as measles, pneumonia, disease and diarrhea is easy to occur. Adults are more common in patients with advanced liver cancer, liver cirrhosis and long-term chronic digestive tract diseases.
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People's Daily Online-Lack of vitamin A can lead to three major causes of dry eye.