Instead of using nail polish to get strong nails it actually dries out your nails and makes them weak. They become brittle and break off.
Leave all nail polish off your nails and put a good lotion on your hands several times a day, especially before bed. Soaking in olive oil once a week can be good too. When the brittle damaged part grows out in a couple of months you will have rock hard nails.
I did this and had long nails for the first time. Then I put nail polish on for a special occasion just one time. They all broke off within a week! You also can't use regular nail polish remover; very drying.
