It is a sugar that is naturally present and identical in all types of tissue: dermis, eyeballs, umbilical cord, etc. Vitreous and transparent by nature, it gives the skin its flexibility and tonicity. However various external factors – sun, smoking, pollution – and internal factors – age-related hormone changes – can reduce the quality and quantity of our hyaluronic acid stock. At age 50, we have lost around half of the stock we had as children! As a result, the skin does not look as fresh; it looks crumpled and wrinkles appear. To stop this damage, aesthetic medicine uses non-animal original hyaluronic acid injections. This fulfils the same function as the hyaluronic acid that is naturally present in our body: it traps water molecules, which generates volume and allows us to smooth fine lines and wrinkles in a flash. Depending on the area to be treated, the doctor will use a more or less cross-linked product, as cross-linking connects the molecules up with one another. The more cross-linked a product is, the more compact and harder it is. But injections do not only repair any damage; they also reboot our own hyaluronic acid production, as well as the production of another vital element for the skin: collagen.