Rump and shoulder muscles from grass and linseed fed cattle as important sources of n‐3 fatty acids for beef consumers

Autor: Robert J. Maddock, Gwendolyn Barceló-Coblijn, Eric J Scholljegerdes, Scott L. Kronberg, Eric J. Murphy
Rok vydání: 2017
Předmět:
Zdroj: European Journal of Lipid Science and Technology. 119:1600390
ISSN: 1438-9312
1438-7697
DOI: 10.1002/ejlt.201600390
Popis: Ground beef has potential to be a relatively inexpensive and sustainable source of n-3 fatty acids (FA) for people who frequently consume it, but don't consume n-3 containing fish. To enhance n-3 FA content in ground beef, we evaluated FA content in pertinent muscles from grass-fed cattle that were supplemented with flaxseed for 75 days before slaughter and compared them with loin muscle from these cattle. Lipids from rump (m. biceps femoris), shoulder (m. triceps brachii) and loin (m. longissimus dorsi) were separated into neutral and phospholipids and FA mass determined using gas liquid chromatography. In phospholipids, concentration of α-linolenic acid (ALA; 18:3n-3), eicosapentaenoic acid (EPA; 20:5n-3), docosapentaenoic acid (DPA; 22:5n-3) and docosahexaenoic acid (DHA; 22:6n-3) were higher in shoulder and rump compared to loin (p < 0.0001). Compared to shoulder, FA concentration was higher in the rump (p < 0.0001) except for DPA (p = 0.53). Masses of n-3 FA, ALA, EPA, DPA, and DHA were increased between 1.5-1.8 fold in the rump and 1.3-1.5-fold in the shoulder compared to loin, respectively. Lean ground beef made with rump and shoulder muscles from grass-fed cattle supplemented with flaxseed has potential to be a source of dietary n-3 FA for many people. Practical applications: Frequently consumed foods containing n-3 FA may help reduce chronic inflammation, atherosclerosis and cardiovascular disease when consumed early in life. Given that many people do not consume recommended amounts of n-3 containing fish, foods they do consume frequently, such as ground beef, should be evaluated as potential useful sources of n-3 FA. Muscles from the rump and shoulder of cattle that are raised on a grass-based diet with flaxseed supplementation have potential to provide more n-3 FA to ground beef consumers than is generally appreciated.
Databáze: OpenAIRE
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