6. Add a glass of milk and a hard-boiled egg to your daily diet. Rich in zinc, they’ll do wonders for your nails, especially if your nails are spotted with white, a sign of low zinc intake.
7. Make your nails as strong as a horse’s hooves, and take 300 micrograms of the B vitamin biotin four to six times a day. Long ago, veterinarians discovered that biotin strengthened horses’ hooves, which are made from keratin, the same substance in human nails. Swiss researchers found that people who took 2.5 milligrams of biotin a day for 5.5 months had firmer, harder nails. In a U.S. study, 63 percent of people taking biotin for brittle nails experienced an improvement.
8. When pushing back your cuticles (it is not necessary to cut them) come in at a 45-degree angle and be very gentle. Otherwise the cuticle will become damaged, weakening the entire nail, says Mariana Diaconescu, manicurist at the Pierre Michel Salon in New York City.
9. Trim your toenails straight across to avoid ingrown toenails. This is particularly important if you have diabetes.
10. File your nails correctly. To keep your nails at their strongest, avoid filing in a back-and-forth motion—only go in one direction. And never file just after you’ve gotten out of a shower or bath—wet nails break more easily.
Next: How to maintain healthier, stronger nails »