Kiehl's iconic anti-ageing vitamin C serum, Powerful-Strength Line-Reducing Concentrate, boosts radiance, helps firm skin and visibly reduces fine lines, wrinkles and pores for smoother-looking skin. Reformulated with 12.5% vitamin C and hyaluronic acid, this patented serum is water-free and is one of Kiehl's most iconic products. BENEFITS Powerful-Strength Line-Reducing Concentrate targets all the visible signs of ageing: - Instantly smoothes the skin surface - Reduces the appearance of fine lines and wrinkles - Improves skin texture - Boosts radiance DID YOU KNOW? Kiehl's became a pioneer of vitamin C skin care products when it began to stabilise vitamin C in its serum. Kiehl's serum contains highly stable vitamin C, which ensures that it holds an effective amount of vitamin C while also being suitable for sensitive skin. Vitamin C in the formula penetrates all superficial and deeper layers of skin - penetrating up to 10 layers deep! Kiehl's has been striving for better ever since 18