The daily biological need for vitamin A is estimated to be 800 retinol equivalents (RE)/d (2667 IU/d) for adult women and 1000 RE/d (3300 IU/d) for adult men; doses > or = 7500 RE (> or = 25000 IU)/d are considered potentially toxic over the long term.
How much is too much of vitamin A?
The tolerable upper intake of 3,000 mcg of preformed vitamin A, more than three times the current recommended daily level, is thought to be safe. However, there is some evidence that this much preformed vitamin A might increase the risk of bone loss, hip fracture [9-11], or some birth defects.
Can I take 10000 IU of vitamin A?
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.
What is the toxicity of vitamin A?
Mental status changes are common following Vitamin A intoxication. In addition, there is a risk for seizures, headache, and blurred vision (due to elevated intracranial pressure). Chronic toxicity can lead to alopecia, anorexia, pruritus, dryness of mucous membranes, muscle and bone pain and hyperlipidemia.
More useful articles on a similar topic 👇
How much vitamin A is toxic to the liver?How much vitamin A is too much?
