To acquaint students with the basic terms used in toxicology. Types and characteristics of poisons present in the human environment. Factors determining toxicity: dependence between the physicochemical structure of xenobiotics and their toxic action. Vulnerability of the body to xenobiotics. Resorption and biochemical transformation of toxins in the body, excretion of xenobiotics. Toxic effects of nicotine, ethanol, acrylamide, pesticides and other compounds to which man can be exposed. Toxic substances of plant origin. Toxicology of compounds contained in cosmetics: fragrances, hair care products, skin, nails. Allergens and allergies: the mechanism of allergic contact dermatitis acquisition. Irriitant contact dermatitis. Achievements molecular biology and proteomics in the cosmetics industry. Cancer mechanisms and factors causing the formation of tumors.