As we grow older, many of us use Vaseline to help make our fingernails stronger and thicker. Additionally, it is very important to eat lots of eggs and dairy products in order to have healthy hair and fingernails. Slather on some Vaseline for a layer of hydrating protection on the nails, which speeds up growth by improving the blood flow to the nails. It also functions as a protective barrier against external chemicals, meaning your nails will stay conditioned with routine exposure.