Cos De BAHA Hyaluronic Acid Serum is a highly concentrated serum. It was aged at low temperature for 24 hours with 1% (10,000 ppm) of hyaluronic acid powder. Cos De BAHA produces cosmetic products in facilities certified by the Korea KFDA. Cos De BAHA products are created from effective ingredients, formulated according to scientific research that determines the precise blend of the most effective scientific ingredients. We will always try to make products that are safe and effective on the skin. This serum is indispensable for its line-smoothing hydrating and plumping properties without a heavy feel. Hyaluronic acid is known to increase our cells' ability to bind water giving our skin a plumper and firmer appearance. Can be used day or night, even around the eyes. It features a higher purity and natural Hyaluronic Acid Powder with a 1% Density Solution and High Molecular Weight (1500 kDa). The pH level is 6.5, making it suitable for all skin types, including sensitive skin. It acts as an intensive hydration and collagen booster.