What it is: A skin care-active primer that delivers instant glow and provides long-lasting hydration.Who it's for: Ideal for all skin types.What it does: The primer instantly smoothes and brightens for better makeup application, finish and wear. In just one week, bare skin is visibly more even-toned, hydrated and smooth. It is powered by fermented kefir and niacinamide, two prebiotics that fuel the ability to maintain a healthy microbiome. How to use: Use fingers to apply a pea-sized amount of the primer from the center of face outward. Apply to the entire face, t-zone or anywhere you want to smooth, brighten and diffuse pores and fine lines. Wear under any makeup to improve makeup application, finish and wear.