OPI products not only make your nails look beautiful, with their fun and up-to-date colors, but they also carry a number of products that help benefit your nails. These products help prevent chipping, strengthen nails, smooth nail surface and promote healthier nails. Since 2006, OPI has reformulated its entire line of Nail Lacquers, Nail Treatments, and Nail Hardeners to eliminate DBP (dibutyl phthalate) and Toluene. Formaldehyde has never been an ingredient in OPI Nail Lacquers or Nail Treatments.