Everyone loses between 40 and 120 strands a day, depending on how much hair you have, your age and your hair's growth cycle. People with fine hair tend to have more of it and therefore will lose more of it than their thicker-haired sisters and brothers. Your hair also thins as you get older, particularly after menopause for women. But unlike aging men, the thinning tends to stop after awhile.http://beauty.about.com/od/hairbasics/f/hairloss.htm