With Kiehl's Powerful Strength Line-Reducing Concentrate you can immediately and lastingly reduce lines and wrinkles. The anti-aging cosmetics bestseller from the Facial Oils & Serums range caused a sensation more than 10 years ago. Now it is back with an improved vitamin C and hyaluronic acid formula and contains 10.5% pure vitamin C. Vitamin C stimulates collagen formation and can thereby improve the skin's elasticity in the long term. In addition, the concentrate is enriched with 2% vitamin Cg, which lastingly improves the skin's evenness and radiance. Completing the anti-aging formula is hyaluronic acid, which plumps up your skin with an extra dose of moisture and further reduces the appearance of wrinkles and lines. But that's not all: The serum has a warming effect on the skin for extraordinary feel-good moments. The result is perfectly hydrated skin with a visibly smoother surface.How to use the Powerful Strength Line-Reducing Concentrate from Kiehl’s First cleanse your skin thoroughly and dry your face. Apply the concentrate to the face in the morning and evening after cleansing, avoiding the eye area. You can use the serum on its own and in conjunction with your moisturiser.