Abstract: Molecular complexes and compositions containing the same are disclosed herein. More specifically, carbohydrate polymers, for example hyaluronic acid or a salt thereof, are complexed with a biologically active compound selected from natural products and nutrients (amino acids, amino esters, hydroxy acids, hydroxy esters, vitamins, cannabinoids, etc.), and active pharmaceutical ingredients to create stabilized molecular complexes. The complexation can be conveniently achieved by means of a resonant acoustic mixing process.