Ithalya IV is the formulation that presents the highest concentration of hyaluronic acid of the Ithalya line ( 26 mg/ml ) and has the highest values in terms of density and viscosity, which translate into a very high G' (approximately 600,000 m. Pas) for greater resistance and elasticity in the tissues. All this makes the gel perfect for all face contouring treatments, increasing volume in areas such as the chin and cheekbones, including the treatment of facial lipoatrophy. The implantation of this formulation is recommended in the medium and deep dermis. The ergonomic glass syringes of the Ithalya® range allow us two important advantages: superior stability and preservation of the gel; better handling and corrective precision due to their small size.