How much vitamin A is too little?
Levels of up to 10,000 IU (3,000 mcg) have been considered safe.
Beyond that, though, vitamin A can build up to cause liver damage and brain swelling; pregnant women who ingest too much run the risk of fetal damage..
How much vitamin A is toxic?
The acute toxic dose of vitamin A is 25,000 IU/kg, and the chronic toxic dose is 4000 IU/kg every day for 6-15 months. (Beta-carotene [ie, provitamin A] is converted to retinol but not rapidly enough for acute toxicity.)
What are the symptoms of lack of vitamin A?
Here are 8 signs and symptoms of vitamin A deficiency.Dry Skin. Share on Pinterest. … Dry Eyes. Eye problems are some of the most well-known issues related to vitamin A deficiency. … Night Blindness. … Infertility and Trouble Conceiving. … Delayed Growth. … Throat and Chest Infections. … Poor Wound Healing. … Acne and Breakouts.
Which foods are high in vitamin A?
The top food sources of vitamin A in the U.S. diet include dairy products, liver, fish, and fortified cereals; the top sources of provitamin A include carrots, broccoli, cantaloupe, and squash [4,5].
What disease is caused by lack of vitamin A?
Vitamin A deficiency is the leading cause of preventable blindness in children and increases the risk of disease and death from severe infections such as diarrhoeal disease and measles. Vitamin A deficiency may also occur in women during the last trimester of pregnancy in high-risk areas.