What can men do to strengthen their nails? Topics | Beauty and Personal Care | Skin Care | Men's Beauty & Personal Care | What can men do to strengthen their nails? Eating a well-balanced diet rich in calcium, iron, potassium, and vitamin B can encourage the growth of healthy nails. It's also a good idea to keep nails clean and dry to avoid infection. If you notice any changes or discolorations in your nails, see your dermatologist.