Consuming large amounts of carotenoids (which the body converts to vitamin A) in food does not cause toxicity because carotenoids are converted to vitamin A very slowly. Usually, no symptoms occur.
Is it possible to get too much vitamin A from food?
Yes, high intakes of some forms of vitamin A can be harmful. Getting too much preformed vitamin A (usually from supplements or certain medicines) can cause dizziness, nausea, headaches, coma, and even death.
How much dietary vitamin A is too much?
Too much vitamin A can be harmful. Even a single large dose — over 200,000 mcg — can cause: Nausea. Vomiting.
What food causes vitamin A toxicity?
In adults, acute toxicity has occurred when arctic explorers ingested polar bear or seal livers, which contain several million units of vitamin A. Chronic vitamin A toxicity in older children and adults usually develops after doses of > 100,000 units (> 30,000 RAE)/day have been taken for months.
Can you overdose on vitamin A from sweet potatoes?
Sweet potatoes contain beta-carotene, and their excessive consumption can lead to hypervitaminosis A (vitamin A toxicity), in which excess vitamin A accumulates in the liver. Although it is not considered harmful, the color of the skin and nails may turn orange.
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