SkinCeuticals's Body Tightening Concentrate tightens and firms the abdomen, buttocks, thighs, knees, and upper arms. This fluid formula cools the skin and improves its elasticity for a younger-looking silhouette.With 2.5% tripeptide, 5% yeast extract, and 2% hydrolyzed rice protein, this concentrate makes the skin look smoother, brighter, and firmer.