D. I. ThurnhamP. MigasenaVenus SupawanLondon School of Hygiene &amp; Tropical MedicineMahidol University2018-03-122018-03-121972-01-01British Journal of Nutrition. Vol.28, No.1 (1972), 99-10414752662000711452-s2.0-0015375840https://repository.li.mahidol.ac.th/handle/20.500.14594/10031The urinary hydroxyproline:creatinine index was measured in forty-one preschool children, ranging in age from 18 months to 8 years, before and after they had received a supplement of 10 mg riboflavin/d for 7 d. It was found that the supplement increased the index in twenty-seven of the children. 2. The children were divided into two groups, those with indices ≤ 1.5 and those with indices > 1.5 before supplementation. 3. The hydroxyproline: Creatinine index was found to increase significantly (P < 0.001) in the group of children whose indices were < 1.5 before supplementation. There was no significant effect on those with indices > 1.5, 4. There was no significant difference between the two groups, in either riboflavin status before supplementation or mean age. 5. The part played by riboflavin in protein utilization and growth is discussed. © 1972, The Nutrition Society. All rights reserved.Mahidol UniversityMedicineNursingArticleSCOPUS10.1079/BJN19720012