Vitamins or supplements for healthy nail growth

Heidi • New mom to a beautiful baby girl
So I just had a baby 2 months ago. And my bod is finally getting completely back to normal, but the thing I miss most is the hormonial awesomeness that helped my nails grow and be strong. I know some of that was also being helped by the prenatals I was on. Does anyone have any suggestions on a type of vitamin or supplement that I can get to help?