Finishing systems need measurable specifications before they become a meat-quality claim

A study published on 5 November provides robust technical evidence that finishing system measurably changes bison-meat composition. The team compared seven representative systems: native-range grazing with differing plant diversity, with or without corn supplementation, and several pen-finishing regimes. Striploins were examined by gas chromatography for fatty acids and by LC-MS/MS for selected metabolites.

The principal contrast was between range- and pen-finished animals. Meat from range systems had higher concentrations of alpha-linolenic acid, DPA and DHA, and omega-6/omega-3 ratios of 2.8 to 3.6. Pen-finished bison ranged from 5.0 to 7.3. Metabolomic profiling also separated the systems: hippuric acid, catechol and shikimic acid were associated with range finishing, while a potentially grain-associated metabolite was higher in pen-finished bison.

For commercial specification, the key result is not that “grass-fed” alone is an adequate promise. Composition was driven mainly by the extensive-versus-pen-finishing contrast; pasture diversity and stocking density had comparatively smaller effects. A nutrition or production-system claim should therefore describe the finishing protocol, supplements and duration instead of relying on a broad label.

The findings cannot automatically be transferred to beef, lamb or every bison product. The authors also note that the total mixed-ration group came from a separate breeding herd. Still, the work shows how fatty-acid and metabolomic data can turn a production system into a verifiable quality specification—relevant to premium assortments and evidence-based communication.