Vitamin A toxicity is due to an obvious cause -- taking too much vitamin A. The Recommended Dietary Allowance of vitamin A for adults ranges from 700 to 1300 mcg daily, depending on several factors
(see Vitamin A Dosage). The Tolerable Upper Intake Level (the maximum that can be taken from all sources, including the diet, without causing significant toxicity) for adults is 3000 mcg daily.
Final Thoughts on Vitamin A Toxicity
If you think you are experiencing toxicity, please let your healthcare provider know. Also, let him or her know if you develop something that "just does not seem right." While it may not be related to vitamin A toxicity, your healthcare provider will be able to diagnose and treat the problem.
Previous