Assessment of Dietary Protein Needs of Older Women
The purpose of this study is to evaluate dietary protein requirements in elderly women aged 80 years and older using the indicator amino acid oxidation technique.
Hypothesis to be tested: Protein requirement for elderly women is higher than the estimated average requirement of 0.66 g∙kg-1∙d-1 protein. The recommended protein intake for elderly women is higher than the recommended dietary allowance of 0.80 g∙kg-1∙d-1 protein.
|Study Design:||Observational Model: Cohort
Time Perspective: Prospective
|Official Title:||Assessment of Dietary Protein Needs of Older Women|
- dietary protein requirement in older women [ Time Frame: 3 month ] [ Designated as safety issue: No ]Dietary protein requirement is assessed by the subjects' differential response to different dietary protein intake
Biospecimen Retention: Samples With DNA
|Study Start Date:||May 2010|
|Study Completion Date:||December 2011|
|Primary Completion Date:||November 2011 (Final data collection date for primary outcome measure)|
There is currently considerable debate regarding the accuracy of the estimated average requirement (EAR) and the recommended dietary allowance (RDA) for older people. Very limited data obtained from older individuals are available to support the assumption that age does not affect protein requirement. Existing method like nitrogen balance has inherent limitations that diminish it from being considered a reference method. Indicator amino acid oxidation technique is emerging as an alternative method to measure dietary protein requirement. It is more accurate and less demanding. The current study will be the first time this technique is used with elderly adults and will provide an important foundation for geriatric nutrition research
Dietary Supplement: dietary control
Seven dietary protein levels will be tested randomly on the 7 testing days: 0.10, 0.30, 0.60, 0.90, 1.2, 1.5, and 1.8 g∙kg-1∙d-1.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01193946
|United States, Indiana|
|W Lafayette, Indiana, United States, 47907|
|Principal Investigator:||Wayne W Campbell, Ph.D.||Purdue University|