Hyaluronic acid is a disaccharide present in all human connective tissues. It is one of the fundamental constituents of the extracellular matrix of the dermis. Thanks to its chemical structure, it increases the level of hydration of the connective tissues. It playes an essential role in preventing and slowing down natural skin aging, as it is essential for the formation of the collagen matrix and elastic fibers and for maintaining hydration.
It’s chemically identical in all species and in all types of tissue, which is why it has a total biocompatibility as it exists naturally in all living organisms, with an identical structure in both bacteria, animals or humans.
The use of hyaluronic acid is well documented not only in medicine and cosmetic surgery but also in other areas of medicine such as ophthalmic surgery and orthopedics. It’s used in aesthetic medicine is the result of complex laboratory syntheses obtained with the aid of biotechnologies.
There are 2 large families:
- Hyaluronic acid of avian origin (type Hylaform).
- Hyaluronic acid of bacterial origin Streptococcus equi also called NASHA (Non-Animal Stabilized Hyaluronic Acid) (type Restylane or Juvederm).
The one that’s used in aesthetic medicine it is a sterile, viscoelastic, colorless and transparent gel composed of crossed molecules of hyaluronate. The quality and duration of reabsorption times depend on:
- Quantity of the hyaluronate molecules
- The intermolecular bonds present in 1 ml of product.