Keratin is the protein found in your fingernails as well as your toenails. Toenail fungus, which is common, can occur when dry, brittle or cracked nails give rise to cracks that permit fungus to enter the nail. Since the development of infection is a gradual process so a slight change in the texture or look of the nail should be considered seriously before it gets much worse. The official website provides a 60-day 100% money-back guarantee on Kerassentials. Before any topical medication can be effective, it is important to remove the thick, fungal material. Jojoba oil is made from the seeds of the Jojoba shrub. Toes are common areas where fungus likes to hang out because they are often damp and warm, encouraging fungal growth. It is possible to remove some of the nail debris, trim off a portion of your nail, and scrape off a little skin.