The Concentrate of La Mer - The Power of Skin Regeneration The Concentrate is a powerful and innovative barrier serum that strengthens the skin, protecting it from daily irritants such as pollution and micro-dust, which contribute to premature aging. Also perfect in moments of extreme stress, such as after dermatological treatments (peeling, laser), The Concentrate promotes the regeneration of the skin barrier, giving the skin a stronger and more soothed appearance.