The surface and micelle-forming properties of two surface-active sugar derivatives and their binary mixtures were studied: dipotassium glycyrrhizinate, which is an anionic surfactant of natural origin (saponin) and has biologically active properties, and a nonionic sugar surfactant decyl glycoside. Decyl glycoside has a noticeably higher surface activity and a noticeably lower CMC value than dipotassium glycyrrhizinate. Using Rubin's equations, the composition of mixed micelles and the parameters of surfactant interaction in them were calculated. It has been shown that a synergistic effect is observed in aqueous solutions of binary mixtures of these surfactants. Due to this, dipotassium glycyrrhizinate can be used together with decyl glycoside as a base for foaming solutions for cosmetic, pharmaceutical and medical foams. Using dispersion analysis of foam over time, the stability of foam stabilized with a mixture of dipotassium glycyrrhizinate and decyl glycoside in a molar ratio of 0.2:0.8 and the ef-fect on the stability of foam of the addition of two different biopolymers: polysaccharide - xanthan (xanthan gum) and protein - keratin of sheep wool hydrolyzate were studied. Based on dispersion analysis of foam micrographs, it was shown that both polymers increase the durability of the foam over time. Foam containing xanthan breaks down primarily through Ostwald ripening rather than coalescence. Foam with keratin hydrolyzate has a lower initial dispersion and number of bubbles than foam with keratin hydrolyzate. The stability of both foams is close, but slightly higher in the case of the addition of keratin.