Composition of carotenoids and its variability were studied in blood serum of different groups of Norisk's population by the method of HPLC in winter 1993. It was shown that prevalence carotenoids in serum of men are licopen and lutein, in serum of women are lutein, licopen and beta-carotene, in serum of children are lutein, criptoxantine, licopen and beta-carotene. Total level of carotenoids in men by 1.7 times lower than in women and by 1.4 times lower than in children. The level of individual carotenoids is decreased in different manners at decreasing of total carotenoids. Minimal levels of carotenoids are near the same in serum of different groups of population.