Indeed, Rejuran can be combined with HA fillers (at this time just non cross-linked HAs); the HA provides the strong hydration effect which Rejuran lacks, and Rejuran provides the strong stimulatory effect that HA might not provide. The choice of the filler therefore depends first and fore-most on the lack of its cross-linking and should best be left to the doctor to decide on.
You can have this done by either combining the two in a single session (manually combining two different syringes, or by using the Rejuran Hb pre-mixed syringe), or performing the treatments at different intervals.
Hope this helps with your questions!
Best Regards and Merry Christmas,
Dr Shane Abucewicz Tan
