Hair loss is often genetic. Not that much you can do about it. Sometimes it could be due to the chemicals in shampoo, though if it hasn't affected you earlier it's unlikely to be the cause. Look out for things such as parabens or phthalates on the label which may cause cancer.

Well, i'm not an expert on shampoo, but my family is uber health conscious. My mom is sure to make a huge fuss if she finds anything "chemical" around. Even junk food, which i LOVE. Anyway, my family uses this herbal shampoo from Sunrider. Works for us fine.