Taking more than 10,000 mcg a day of oral vitamin A supplements long term can cause: Bone thinning. Liver damage. Headache.
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.
How many grams of vitamin A is too much?
Therefore, while it's crucial to meet the RDA of 700–900 mcg daily for adults, it's also essential not to exceed the daily upper limit of 3,000 mcg.
Is 3000 mcg of vitamin A too much?
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.
Can you get too much vitamin A from food?
If you get too much vitamin A, you can develop a form of poisoning or toxicity called hypervitaminosis A. But eating too many vegetables will not cause hypervitaminosis A.
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