Hyaluronic acid is a substance that naturally exists in our skin. With a composition similar to jelly, hyaluronic acid is already present in our tissues and we may produce more if required for our health. It fills up the spaces between collagen and elastin fibres, both of which are types of proteins. Fillers, like Juvéderm, are composed of hyaluronic acid and treatment helps to boost levels of the substance in our skin. This is beneficial for the complexion, as it allows the skin to retain more moisture by attracting water molecules. It also adds more cushioning and lubrication in the skin. A combination of these reasons explains why fillers can have a positive impact on wrinkles and facial contours.
Adding more hyaluronic acid to your skin to retain youthful contours becomes more important as you age, since levels decrease in response to the aging process and environmental factors. Fillers based on hyaluronic acid are preferred to those made from bovine collagen, as they have a far lesser rate of allergic reaction and other negative side effects.