Better Nail is a powerful toenail fungus treatment with a 25% concentration of undecylenic acid. combined with six high-quality, all-natural oil extracts: Citronella, Lavender, Tea Tree, Sweet Almond, Jojoba, and Clove Bud. Better Nail’s specially formulated antifungal ingredients penetrate deep into the affected area to get at the source of the problem. We know that many nail fungus sufferers feel embarrassed, uncomfortable, and frustrated with their nail health. This formula is designed to give you peace of mind!