Hypervitaminosis A is a disorder in which there is too much vitamin A in the body.
Vitamin A toxicity
Vitamin A is a fat-soluble vitamin that is stored in the liver. Many foods contain vitamin A, including:
Some dietary supplements also contain vitamin A.
Supplements are the most common cause of vitamin A toxicity. It tends not to occur just from eating vitamin A-rich foods.
Too much vitamin A can make you sick. Taking large doses during pregnancy can cause birth defects.
Symptoms may include:
Treatment involves simply stopping supplements (or in rare cases, foods) that contain vitamin A.
Most people fully recover.
Complications can include:
Taking too much vitamin A during pregnancy may cause birth defects. Talk to your health care provider about eating a proper diet while you are pregnant.
You should call your provider:
How much vitamin A you need depends on your age and sex. Other factors, such as pregnancy and your overall health, are also important. Ask your provider what amount is best for you.
To avoid hypervitaminosis A, don't take more than the recommended daily allowance of this vitamin.
Some people take vitamin A and beta carotene supplements in the belief it will help prevent cancer. This may lead to chronic hypervitaminosis A if people take more than is recommended.
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