The Ordinary - Multi-Peptide + HA Serum - a lightweight, watery facial serum. This versatile formula combines a number of technologies to smooth the skin and fight the signs of aging. Thanks to the use of five carefully researched peptide technologies, skin-beneficial amino acids and a number of hyaluronic acid compounds, the serum helps to significantly reduce "crow's feet" around the eyes and increase skin elasticity and firmness. The product has a pH of 4.5 to 5.5.