Hyaluronic acid is the only foreign (heterologous) filler that we use in our practice.
This is because it has proven its safety, in contrast to collagen, silicone and other materials that have been used over the years. With the correct usage of a quality material any possible adverse reactions are extremely rare. Still, we use it mainly in the nasolabial folds and in deeper wrinkles around the mouth where the result is very pleasing and natural.
When we believe that a larger amount is required for volume and if the areas that need to be addressed are other like for example lips, cheek-bones and near the eyes, we recommend other methods, such as lipofilling (fat grafting).