Q: I found out recently that the hair loss I’ve been experiencing during the past couple of years was directly attributable to vitamin A. I was taking 25,000 IU a day of vitamin A in my daily vitamin pill. Apparently that is toxic and causes hair loss. I just wanted to warn others.
A: Too much vitamin A can cause hair loss, along with loss of appetite, skin problems, headache, fatigue and many other problems. The usual recommended intake is 5,000 IU daily for adults, so you were definitely getting far too much.
Joe Graedon is a pharmacologist and Teresa Graedon is an expert in medical anthropology and nutrition. They can be reached at firstname.lastname@example.org.