Anti-aging serum based on blueberry extract, guaiazulene, and adenosine with only 10 ingredients. With this night serum from Klairs, the signs of skin aging can be prevented and reversed. The double peptide formula plumps up fine lines and stimulates collagen production for plump and smooth skin. This serum consists of only 10 ingredients, making it suitable for all skin types. Blueberry extract, a powerful antioxidant, improves collagen and moisture levels, while guaiazulene soothes the skin and helps it recover from UV damage. The distinctive blue color of this serum comes from the ingredient guaiazulene.