Why Is My Hair Falling Out?--Causes and Top 10 Natural Remedies
A 2010 study carried out at Duke University Medical Hospital in Durham, North Carolina found that iron deficiency can play a role in female pattern hair loss. Iron supplements can help redress this deficiency. (Read more about the Top 10 foods high in iron.)
By the way, certain things you do block your body's ability to absorb iron. One is drinking too much tea. Another is getting too much Vitamin D.