The Claim
Feeding lubabegron fumarate (Experior) to feedlot steers for the final 56 days on feed increases longissimus muscle area by 4.03–6.23 cm² compared to a no-beta-agonist control group and reduces marbling scores by 14–39 points during some feeding durations.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
When feedlot steers are given lubabegron fumarate for the last 56 days before slaughter, their loin muscle area becomes larger by 4.03–6.23 cm² and their marbling scores decrease by 14–39 points compared to steers not given the compound.
See the scientific wording
Feeding lubabegron fumarate (Experior) to feedlot steers for the final 56 days on feed increases longissimus muscle area by 4.03–6.23 cm² compared to a no-beta-agonist control group, but reduces marbling scores by 14–39 points in some feeding durations, indicating a trade-off between lean muscle gain and intramuscular fat deposition.
The drug binds to beta-3 receptors on muscle and fat cells, causing muscle cells to build more protein and grow larger while fat cells stop storing fat. This shifts energy use away from making marbling fat and toward increasing lean muscle mass.
What the research says
1 studyWhen cattle are given this drug called Experior for the last 56 days before slaughter, their ribeye muscle gets bigger, but the fat inside the meat (marbling) decreases — which is exactly what the claim says.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.