Common to all animal species, it contributes to the creation part of the dermis extracellular matrix representing one of the major component of connective tissue. 
Hyaluronic acid plays a key role in giving firmness and consistency to the skin: by linking to the collagen, to fibronectin and to proteoglycans it creates macromolecular complexes that give to the skin a sort of scaffolding.
 

Its excellent biocompatibility makes it as the best possible tool in anti-aging therapies developed by fillers.