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A collaborative study of methods of protein evaluation: introductory paper
C E Bodwell1, K J Carpenter, F E McDonough
1Energy and Protein Nutrition Laboratory, USDA, Beltsville, MD 20705.
Plant Foods for Human Nutrition (Dordrecht, Netherlands)
|January 1, 1989
Summary
This study evaluated protein quality assessment methods for food labeling. While in vitro digestibility shows promise, challenges remain for heat-damaged foods and certain beans.
Area of Science:
- Food Science
- Nutrition Science
- Protein Chemistry
Background:
- Accurate assessment of dietary protein quality is crucial for food labeling and consumer guidance.
- The United States Department of Agriculture (USDA) initiated a collaborative study to address this need.
- Existing methods for protein quality evaluation required further validation and refinement.
Purpose of the Study:
- To evaluate various methods for assessing protein quality in foods.
- To establish a foundation for improved food labeling practices regarding protein content.
- To identify limitations of current protein evaluation techniques.
Main Methods:
- Collaborative study involving multiple laboratories and methods.
- Evaluation of in vitro digestibility procedures.
- Assessment of protein quality in various food matrices, including heat-damaged materials and pinto beans.
Main Results:
- The general utility of in vitro digestibility methods for protein quality assessment was confirmed.
- Specific challenges were identified in the in vitro evaluation of heat-damaged protein sources.
- Difficulties were also noted in accurately assessing the protein quality of certain pinto bean varieties using in vitro methods.
Conclusions:
- In vitro digestibility methods are largely effective for protein quality evaluation.
- Further research is needed to refine in vitro techniques for heat-damaged foods and specific legumes like pinto beans.
- Improved protein evaluation methods are essential for accurate food labeling.