La Mer The Concentrate is a serum that is formulated for all skin types. Containing Concentrated Miracle Broth a super-potent form of La Mer's powerhouse elixir helps reduce the appearance of visible signs of inflammation and helps visibly calm skin so it can focus on natural renewal. With daily use, skin emerges stronger, more stable and visibly soothed. After just 14 days, skin's natural barrier was significantly strengthened.