The proposed cluster of inventions relates to chemical industry, in particular to compositions of and additives in detergents designed for household, professional or personal use, to be used at home or industrially. The essence of this cluster of inventions lays in the use of polysaccharide microgels as an additive or the base in detergents, in particular as an antiresorption agent, thickener, or an agent for reducing surface tension at the interphase boundary, including also composition of detergents with polysaccharide microgels. The technological result of the application of these inventions is reduction of the quantity of surfactants in the detergent, while its detergency is no affected, which raises their ecological value and safety for the final users.