Non-crosslinked hyaluronic acid: mainly used for water needle injection. Strong hydrophilicity can enrich and moisturize the skin, but the effect lasts for a short time.
Cross-linked hyaluronic acid: through purification and cross-linking addition process, hyaluronic acid has a longer action time, more stable properties and lower allergic rate. It is divided into low density, medium density and high density hyaluronic acid.
Low-density hyaluronic acid is mainly used to correct fine lines, with shallow injection level and short duration.
Medium density hyaluronic acid is suitable for deep wrinkles and folds, and the effect is lasting.
High-density hyaluronic acid is suitable for filling the deepest wrinkles, cheekbones, lips and other volumes, or filling and correcting local depressions after trauma, with good supporting effect and relatively long maintenance time.
In addition, hyaluronic acid is also divided into injection, eye drops, external application, food and other different uses.