A few things can cause hair loss, low zinc, low thiamine, low thyroid, low ferritin (low iron in cells), low vitamin E, testosterone issues. I would try adding a zinc supplement first.  If that doesn’t do it a Health Assessment would give us the info needed to determine what imbalance is causing it. 🙂
http://astore.amazon.com/marisnutran05-20/detail/B000FGXMAY
I suggest 30-50mg at breakfast…please note that as you increase zinc, it can cause nausea so slowly increase. Start with 15mg a day for a week, then double it the next week, increase again until you are at 50mg/day.