The subject of the studies was the soil with introduced solutions containing 0. 1% chitosan. These materials were obtained from the Institute of Chemical Fibres in L6d2 (in the form of a microcrystalline gel) and also from the Department of Food Biochemistry and Chemistry of the University of Agriculture in Lublin (in a liquid form. i. https://megavitamines.shop/product-category/melatonin-gummies-adults/