Our 7-day Nail Repair serum contains acetic acid, disodium EDTA, and alternate leaf oil. It can promote healthy and strong nails. Used to strengthen and nourish nails and to help eliminate fungi that may affect nails. Soften infected nails, deeply nourish nails, and thicken fragile nails. Its application is simple: file down the affected area of the nail to enhance the permeability of the serum; Clean surface dry swab/cloth with detergent; Apply the serum to the entire surface of the affected nail; Use antifungal soothing oil twice a day (morning and evening) for at least 4 weeks. Strengthen nails to promote rapid growth, avoid flaking, prevent breakage and damage to nails, and improve the appearance of nails.