Tag: Safe vitamin a levels

According to the National Institutes of Health, the tolerable upper intake level (UL) of preformed vitamin A for adults is 3,000 mcg RAE (10,000 IU) per day. However, exceeding this amount, especially through supplements, can lead to a toxic condition known as hypervitaminosis A.

According to the World Health Organization, vitamin A deficiency is the leading cause of preventable blindness in children worldwide. For adults experiencing uncomfortable symptoms, understanding how much vitamin A should I take daily for dry eyes is crucial for supporting ocular health.