The present invention generally relates to the field of hyaluronic acid (HA) dermal fillers, and more specifically to methods for preparing crosslinked HA-based compositions in the form of a gel comprising high-temperature dialysis and/or crosslinking in the presence of phosphate and an alkaline metal halide salt. The present invention further relates to crosslinked HA-based gel compositions prepared by said methods and their use as dermal fillers in aesthetic applications such as wrinkle treatments.
