Complexes of hyaluronic acid hybrid cooperative

Stable complexes cooperative hybrid L / H-AH prepared by heat treatment at a temperature between 80 ° C and 160 ° C, to solutions containing simultaneously hyaluronic L-AH acid or hyaluronan and hyaluronic acid H-HA or hyaluronan in the the molecular weight of L-AH is between 1 · 1 · 104 and 106 Da and H-AH is given by the formula AH PMH-5> = PML-AH / 0.9 and wherein H-AH and L-AH are present in amounts ranging relative 0.5-2.