Which product is typically used to protect the natural nail during a manicure?

A nail base coat is the product typically used to protect the natural nail during a manicure. The primary function of a base coat is to create a barrier between the nail plate and the nail polish, preventing staining and yellowing of the nails that can occur from pigments in colored nail polish. Additionally, a base coat can help improve the adhesion of the polish to the nail, ensuring a smoother application and enhancing the longevity of the manicure.

While nail polish serves as the decorative layer and nail oil can help hydrate and nourish the nails and cuticles, they do not offer the same protective benefits against potential damage or staining. Nail glue is used specifically for adhering artificial nails or nail enhancements but does not provide any protection to the natural nail itself during a standard manicure process.