The hyaluronic acid is the safest face filler and it would be possible to confirm that he ispractically free of complications. Nevertheless, the number of processes that are practiced is so high that some complications exist.
Most of the complications are due to a bad indication in the type of hyaluronic acid to use or to using a low quality brand. There are zones where the injection of this fillers is more complicated as it is the case of the tear through, the cheekbones and the lips. And, what still complicates more this indication it is correct decision in which type of conjugation and what brand of hyaluronic acid to use for each aim.
From our point of view there are only three brands that give us the maximum security, these are Restylane (Galderma), Juvederm (Allergan) and Teosyal (Teoxane). Despite, the engineering used for the conjugation of the different types and brands of hyaluronic acids is different.