nails

I take a hair skin and nails vitamin supplement that I bought at a health food store. It's by Life Fitness and called Hair, Skin and Nails. - Lots of good stuff in there!

I take 3000mcg of biotin every day. My toenails started splitting, peeling, and eventually.. became non-existant after i moved to The Great White North. (I think it was all the socks, honestly). Works greaaat! Any drug store will do (I get mine at Target)

if its not a diet deficient problem, then two fantastic products i would swear by are Mavala Nail scientifique or nailtique formulas, i have always had good nails but a poor diet some time ago made them split and crack sall over the place, these got them back to normal nice and tough, i have even got my mum or anyone else that listens to my goings on onto them
however i am not encouraging you to forgo a healthy diet but either one along with healthy eating and suppliments will compliment it no doubt, hope that helps