Greying is not fun especially when you start to exhibit pre-mature greying in your early 30′s.  Greying happens naturally with due to genetics.  However, sometimes it can be caused by stress or hydrogen peroxide in products.  What can we do to help prevent the greying.  Stop using any products that have hydrogen peroxide.  Many shampoos, conditioner, and colors have this chemical in it so read the ingredients carefully.  On a recent episode of Dr. Oz  he suggested taking Chlorella daily, about 1000 mg a day.  This will help release toxins and prevent additional greying over time.