Tag: Retinol overdose

According to the National Institutes of Health, the Tolerable Upper Intake Level (UL) for adults is 10,000 IU of preformed vitamin A, which can be a dangerous amount with chronic supplement use. So, for many people, the answer to 'Is 10,000 IU of vitamin A a day too much?' is a definite yes, particularly if it comes from supplements over a long period.

Vitamin A toxicity, or hypervitaminosis A, is an uncommon but potentially serious condition that can result from excessive consumption of preformed vitamin A, most often from supplements or certain animal products like liver. This happens because, unlike water-soluble vitamins, the fat-soluble vitamin A is stored in the body and can build up to harmful levels over time.

According to the National Institutes of Health, excessive intake of preformed vitamin A from supplements is a more common toxicity risk than dietary sources in Western countries. Understanding how to tell if too much vitamin A is affecting your body is crucial for preventing potentially serious health complications.