Piktelite O S, Aleĭnik S I, Iakushina L M, Blazheevich N V, Isaeva V A, Alekseeva I A, Glinka E Iu, Grishchenko N L
Vopr Pitan. 1992 Jul-Aug(4):32-5.
Providing with vitamins of schoolchildren was studied in some regions of Lithuania during the winter-spring period. The biochemical blood count has revealed insufficient providing of schoolchildren with ascorbic acid, beta-carotene, vitamins B1, B2 and B6. Decreased levels of ascorbic acid in urine, as well as micro-symptoms of hypovitaminosis (ascorbic acid, thiamine and riboflavine deficiencies) have been recorded.