SKIN TYPE: All skin types / The Powerful Strength Line Reducing Concentrate is a powerful anti-aging serum that counteracts skin aging. After several years of research by the Kiehl's laboratories and the latest dermatological findings, Kiehl's has achieved another innovation: the formula of the anti-aging serum has been expanded to 12.5% pure vitamin C concentrate. In combination with hyaluronic acid, the vitamin C serum promotes collagen production in the skin even more effectively in order to sustainably support the skin's elasticity. A further 2% vitamin Cg (ascorbyl glucoside) was obtained for the formula in order to actively and long-term improve the evenness and radiance of the skin. Hyaluronic acid also has the property of binding large amounts of water. This means that the skin is supplied with long-lasting moisture and is visually plumped up. This extra moisture boost reduces wrinkles in the long term and gives the skin a visibly smoother surface. At the same time, the moisturizing serum stimulates skin regeneration thanks to its selected ingredients, giving you a youthfully radiant, even complexion. The adapted formula of the anti-wrinkle serum is rounded off by an even longer shelf life and greater efficiency. The facial serum from Kiehl's has a pleasantly warming effect when applied - for real moments of well-being. The anti-aging serum not only leaves your skin feeling smooth and looking more youthful, it also impresses with its fresh citrus aroma. Benefits: The anti-aging serum works against wrinkles, lines and sagging skin Improves skin elasticity Promotes the skin's own collagen production Provides long-lasting moisture Supports skin regeneration and cell renewal