How do you stop hair loss in women? IS there any supplements or treatments that work to prevent hair

I don't think so. If it is hereditary then you are stuck. Rogaine for women works really well but takes four months to see a difference. Hair extentions are popular now if your hair is VERY thin.

Have you told your doctor? Possible it could be an thyroid or hormonal issue.

OBTW, take a multivitamin everyday.