Here's how the condition affects your feet and what we can do to help. To prevent future toenail fungus, it is important to keep your nails trimmed, clean, and dry. Within a few weeks, you will notice a dramatic improvement in nails. If your immune system is weak, your body is more likely not to fight viral infections. Add a few drops from oregano oil into a carrier such as olive oil, coconut oil, or coconut oil and apply it the nails. Regular use Kerassentials Oil promotes immunity. Kerassentials is upfront about the full list.