Besides fat injections, which filler has the least chemicals and more natural ingredients for the face?

Hi Diori.  The most natural dermal fillers are the ones made with Hyaluronic Acid.  These include Restylane, Perlane, Juvederm (all types) and Belotero.  Good luck.  

That is a great question!  There are many fillers on the market.  In my opinion, the ones with hyaluronic acid are the safest and most natural. These include juvederm, restylane, perlane.  Our bodies contain hyaluronic acid naturally.   With these fillers you are replacing what degrades naturally.There is always a chance of allergic reaction, but in my opinion these are the least allergenic.It is very important to see a dermatologist or plastic surgeon who specializes in these treatments.Dr. Daniel Radin,  Dermatologist, Windsor, Ontario, Canada