Children 4–8 years
How much vitamin A is excessive?
The recommended daily allowance (RDA) for vitamin A is 900 mcg and 700 mcg per day for men and women, respectively — which can be easily reached by following a whole-foods diet ( 27 ). However, it's important not to exceed the tolerable upper limit (UL) of 10,000 IU (3,000 mcg) for adults to prevent toxicity ( 27 ).
How much vitamin A is toxic to humans?
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.
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