What main ingredient is in the OPI nail and not in other brands?

The main ingredient in OPI nail products that sets them apart from many other brands is their proprietary blend of ingredients that often includes a unique formulation of pigments, resins, and film-forming agents. OPI is also known for its high-quality nail lacquers that provide durability and a glossy finish, which may not be present in other brands' formulations. Additionally, OPI often incorporates nourishing ingredients like vitamins and antioxidants to promote nail health.