Summary
This paper addresses a methodological gap in life cycle assessment by proposing protein quality as a complementary functional unit alongside conventional mass-based metrics. By integrating nutritional quality into LCA frameworks, the authors argue for more nuanced environmental impact comparisons across diverse protein sources. This approach bridges nutrition science and environmental assessment, enabling more holistic evaluation of food system sustainability.
Regional applicability
The proposed methodology is applicable to UK food policy and industry seeking to align environmental and nutritional objectives in product assessment and labelling. This framework could inform UK government nutrition and sustainability guidance, particularly for protein source comparisons in dietary recommendations.
Key measures
Protein quality metrics (amino acid composition, digestibility, bioavailability); LCA environmental impact indicators; functional units in LCA methodology
Outcomes reported
The study proposes protein quality as a complementary functional unit in life cycle assessment (LCA) to better account for nutritional differences across protein sources. It likely examines how incorporating protein quality metrics (such as amino acid profile or digestibility) can refine environmental impact assessments of food products.
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