Diet can be adjusted to include more protein, zinc, iron and biotin to speed up the growth of nails. Increased blood flow to the fingers speeds up growth as well. Activities such as playing the guitar, typing or massaging the hands and fingers increases blood flow to the fingers.
Nails are made of a protein called keratin, which is why it is important to add protein to the diet. Zinc is found in foods such as oysters, lamb and oats. Red meats, leafy green vegetables and shellfish increase iron levels in the body. Biotin is most commonly found in over-the-counter vitamin B supplements. It is also important to stay hydrated so the nails do not become brittle.