I am 37, and I never have to cut my toenails. They don't grow. My fingernails do, but I bite them. I know I shouldn't but I do. However, what could make my toenails not grow? My 7 year old daughter's toenails don't grow either. She never has to have hers cut. Is there a nutrient or vitamin we are missing, or is it just something that we were born with? My 15 year old son's toenails grow, and he has to cut them every few weeks. Also, noone in my family had this problem. They don't hurt or anything, and it's really not bothersome, I just wonder if it's something causing it. Thanks for any replys.