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Targets and procedures for altering ruminant meat and milk lipids
1Department of Animal Production, University of Gent, Melle, Belgium. Daniel.Demeyer@mug.ac.uk
The Proceedings of the Nutrition Society
|December 22, 1999
Summary
Modifying ruminant fat composition, including milk and beef, can improve health perceptions. Strategies focus on reducing saturated fats and increasing beneficial fatty acids through diet and breeding.
Area of Science:
- Animal Science
- Nutritional Biochemistry
- Food Science
Background:
- Ruminant lipid profiles, particularly saturated fats, negatively impact beef and dairy health perceptions.
- Rumen lipid metabolism significantly influences the fatty acid composition of animal products.
Purpose of the Study:
- To review rumen lipid metabolism and its impact on fatty acid profiles in ruminant tissues.
- To explore dietary and breeding strategies for modifying ruminant fat composition, focusing on health benefits.
- To discuss limitations and considerations for altering ruminant fats.
Main Methods:
- Review of scientific literature on rumen lipid metabolism, fatty acid biohydrogenation, and transfer into milk and adipose tissues.
- Analysis of dietary interventions and genetic factors influencing fatty acid composition.
- Examination of consumer acceptance, animal welfare, and environmental impacts.
Main Results:
- Rumen biohydrogenation produces trans-fatty acids; strategies exist to reduce this process.
- Dietary modifications can enrich milk fat with polyunsaturated fatty acids and conjugated linoleic acids.
- Breed (e.g., Belgian Blue), conformation, and feed significantly affect adipose tissue distribution and fatty acid composition in beef cattle.
Conclusions:
- Ruminant fat modification is achievable through targeted dietary strategies and selective breeding.
- Balancing nutritional improvements with consumer acceptance, animal welfare, and environmental sustainability is crucial.