It is important to eat healthy and have a good diet to help promote nail growth. There are some products out there that can help you too. The one I like specifically is from this company called NailAid. They have a product called Grow Strong, which does help to promote nail growth. And it truly does work, unlike the Sally Hansen stuff, or even Nutranails. I tried both the other two, and no success. But NailAid did it for me. You can even buy on line, quick and easy. www.nailaidcares.com.
Good Luck!

you cant, your nails are old calcium from your bones, your body get's rid of it in its own time.

Drink milk