they also peel when they get weak...mine do it too...Hair skin and nail vitamins really do work...i have used them and it makes your nails super hard...but you won't see the results for a long time though since it will take time for the new nails to grow in.
There may be some diseases of your nail. So you shoould protect your nail carefully. Also, maybe they are lack of moisture. Visit: http://www.getbetterlife.com/blog for many basical information on nail protection.