Hydroxyproline excretion and nutritional status of children
Open Access
- 1 February 1973
- journal article
- clinical trial
- Published by Elsevier in The American Journal of Clinical Nutrition
- Vol. 26 (2), 173-176
- https://doi.org/10.1093/ajcn/26.2.173
Abstract
Hydroxyproline excretion was measured in 15 healthy girls, 7 to 9 years of age who participated in a metabolic study for 36 days. During the last 30 days of the study, the diets supplied either 24 or 46 g protein daily. Hydroxyproline excretion by the girls receiving the lower protein intakes decreased from 75.3 ± 18.1 to 57.9 ± 19.2 mg/24 hr. Hydroxyproline excretion of the subjects fed 46 g protein daily remained essentially constant throughout the study. In a second experiment, two replicate metabolic studies, each with 16 girls, 7 to 9 years old, were conducted for 20 days. The basal diet daily supplied 25 g protein and 0.26 g calcium. During days 9 to 20, one-half the subjects were given supplements of lysine, threonine, and methionine and one-half were given an isonitrogenous amount of ammonium citrate. One-half of each group was given daily 1.01 g supplemental calcium as calcium lactate. Hydroxyproline excretion decreased in all groups. The average decrease in excretion was greater in the groups receiving the calcium supplements; however, the difference between the four groups was not statistically significant.Keywords
This publication has 8 references indexed in Scilit:
- Lack of response to amino acid supplements by preadolescent girlsThe American Journal of Clinical Nutrition, 1972
- Excretion of nitrogen in sweat by preadolescent girls consuming low protein dietsThe American Journal of Clinical Nutrition, 1972
- Nitrogen-Balance Studies with Children Fed Foods Representing Diets of Low-Income Southern FamiliesThe American Journal of Clinical Nutrition, 1970
- Modifications of a specific assay for hydroxyproline in urineAnalytical Biochemistry, 1967
- Skeletal metabolism in early infancy: Urinary hydroxyprolineThe Journal of Pediatrics, 1966
- HYDROXYPROLINE CREATININE RATIO AS AN INDEX OF NUTRITIONAL STATUS AND RATE OF GROWTHThe Lancet, 1965
- Urinary Hydroxyproline Excretion and GrowthPhysiological Reviews, 1964
- RELATIONSHIP BETWEEN URINARY HYDROXYPROLINE AND GROWTH*JCI Insight, 1962