NonyX (pronounced Non-X) Fungal Nail Clarifying Gel clears out yellowing keratin debris buildup in toenails and fingernails. Keratin debris is the food supply and environment where nail fungus thrives. Once keratin debris is exfoliated, nails are clear and attractive again. Easy to use: Apply a few drops twice daily to the nail surface and under tips. The 4 oz. bottle is a 6 month supply. NonyX is a choice of doctors and has been used by podiatrists for over ten years.