OTC/Lifestyle Pearl of the Day: Better Nail Indication: Better Nail is an anti-fungal product for fungus under and around the nails. Insight: 25% undecylenic acid. It can be used for ringworms, athlete’s foot, scaling, crackling, burning, redness, and irritation. Apply daily to the nails and the surrounding area of the nail. Source: Better Nail - Treatment for Fungus Under & Around the Nail – Rejuvica Health