A strong immune system can fend off many types of infections, including toenail fungus. Eating a balanced diet rich in antioxidants, vitamins, and minerals, staying hydrated, getting adequate sleep, and managing stress are all beneficial in maintaining overall health. Additionally, avoid nail polish and artificial nails as they can trap moisture and create an environment conducive to fungal growth. Regular exercise will also improve blood circulation to your feet, helping to keep your nails healthy and strong.