Middle and high grade. High-end describes the middle and high level of things. Hyaluronic acid is a polysaccharide with good water retention and adhesion, and it is one of the important tissue components of human skin, cartilage and bone. Nora hyaluronic acid is a micro plastic cosmetic product, which can repair facial wrinkles and fine lines, improve the texture of facial skin and restore the elasticity of facial skin. So Nora belongs to the middle and high level.