Hi i have been a hairstylist for 20 years, and have had many clients complain of hair loss, i have found that it could be caused by your diet, hormones, lupus, thyroid, or drinking to much alcohol, no dermatologist could help any of my clients, i found with my experience when i have had hair loss using hair vitamins worked the best, Nu-Hair for women from CVS pharmacy , ask the clerk where its located as it isn't usually in the vitamin section, i have recommended this for many years, hope this helps. Jill