Made with PHMB 0.5%, 40% Urea. PHMB is known treat nail fungus, bacteria, yeast, mold, etc. Urea will soften the area allowing the PHMB to better penetrate the nail bed. Works well together with laser treatment as it does not have oils which can refract the laser light. One 10mL bottle will last approximately 3 months if used on all nails.