TARGETS TOUGH FUNGUS FAST: Fights fungus under and around the nail with a clinically proven ingredient to reduce unsightly fungus, itching, and burning MAXIMUM STRENGTH FORMULA: Contains 25% Undecylenic Acid, the highest concentration available OTC, for reliable fungus-fighting power EASY-TO-USE PRECISION APPLICATOR: Mess-free brush applicator targets fungus directly for quick and efficient results POWERFUL OIL-INFUSED REMEDY: Includes six natural oils—Tea Tree, Lavender, Jojoba, Clove Bud, Citronella, and Sweet Almond—plus Vitamin E to support skin health NATURAL + SCIENCE-BACKED: Combines proven science with natural oils to help nourish and hydrate nails and skin BetterNail is a remedy with 25% undecylenic acid shown to support the elimination of fungus under and around the nail. Contains the highest concentration of Undecylenic Acid allowed.