Tip - Vitamin Deficiency & Thinning Hair in Women | LIVESTRONG.COM

Thinning hair and hair loss can be an unpleasant, even traumatic, experience for women. A review published in 2009 in the "Cleveland Clinic Journal of Medicine" reports that losing 100 to 150 hairs per day is considered normal. If your hair is thinning, it might be due to a nutrient deficiency, although there are other possible causes.