Decai hyaluronic acid originated in South Korea, and premium is the name of a series of hyaluronic acid under the Willis brand in New Zealand. There are two or three or four models, two in a box, and one is 1ml.

Hyaluronic acid is an acidic mucopolysaccharide. Decai hyaluronic acid No.2 is suitable for superficial wrinkles, and No.3 is suitable for forehead, decree lines, temples and risorius. Polymer 4 is suitable for periosteum, nose and chin.