nails

I was reading online about why nails keep breaking a lot of people were saying it could be because of a vitamin or mineral deficiency. Anyone hear about this and how did you fix it?

gender: female Age: 42 I have nails that keep breaking off and are splitting like on my toes and my thumbs. When I try to cut my nails they snap so easy. I heard that human growth hormone hgh can help with this. How much can I use and what are the side effects I should watch out for?