Too much vitamin A is toxic to the body and can even be fatal. You probably won't get toxic amounts of vitamin A from your daily diet, but taking vitamin A supplements without a health care provider's supervision is not recommended. Vitamin A is found in many different types of vitamin formulas. If you take a variety of different formulas, you could put yourself at risk for vitamin A toxicity. Some of the symptoms of vitamin A toxicity are lasting headache, fatigue, muscle and joint pain, dry, cracking skin and lips, dry, irritated eyes, nausea or diarrhea, and hair loss.
Alcohol use makes vitamin A toxicity more likely.
A derived drugs used to treat acne, psoriasis, and other skin problems. The Doctor's Complete Guide to Vitamins and Minerals. Vitamin A supplementation and child mortality. Fawzi WW, Mbise RL, Hertzmark E, et al. A randomized trial of vitamin A supplements in relation to mortality among human immunodeficiency virus-infected and uninfected children in Tanzania.