I need your advice on non surgical procedures for volume loss besides fillers

This is a great question and one that we are seeing more and more with the advent of weight loss surgery and new treatments available. At 22, you may still experience some further skin recoil as your skin is still resilient. I would agree to wait on fillers for the moment. There are some skin tightening treatments such as radiofrequency and the new Cellsound. Anoter option is to boost your skin response with the use of Platelet Rich Growth Factor. There are a couple of these products now in the US. Endoret is the one we have been using. You use your own blood, similar to PRP, and are able to add volume as well. The growth factors in the injections will also stimulate your own repair process. I hope that this helps!

If you do not want to consider traditional HA fillers you may want to consider Sculptra. This works differently than HA fillers and helps your body to stimulate collagen production. I've included a video on it that I hope you find helpful.

The best way to restore facial volume and a more youthful appearance is with fat grafting. In the procedure of fat grafting, a proper fat is chosen for harvesting, and then transferred into the area where the fat has been lost, according to the photographs prior to weight loss. This way you can look just like your younger self with results which are natural and practically permanent. I hope this helps and good luck from New York City Plastic Surgery.