A radiant primer is a makeup base designed to create a luminous and glowing complexion. It often contains light-reflecting particles or hydrating ingredients to enhance skin's natural radiance and provide a smooth canvas for foundation.

Primers containing ingredients like silicones or hyaluronic acid can help to minimize the appearance of wrinkles by creating a smoother surface. These fillers temporarily plump the skin, reducing the depth of fine lines for a more youthful look.

Apply a pea-sized amount of radiant primer to clean, moisturized skin before foundation. Focus on areas where you want to enhance radiance, like the cheekbones, forehead, and bridge of the nose. Allow the primer to absorb for a minute or two before applying foundation.

The 'highest rated' face primer varies depending on skin type and desired finish, but consistently well-reviewed options include those from brands like Milk Makeup, Smashbox, and Laura Mercier. Consider reading recent reviews and comparing ingredients to find the best fit for your needs.