Astragalus feed study links sheep meat traits to muscle pathways
Bottom line
A new Animals (MDPI) study reports that adding Astragalus membranaceus powder (AMP) to the diets of Ao-Hu crossbred rams changed both meat-quality traits and the molecular profile of the longissimus dorsi muscle after a 70-day feeding trial. According to the study abstract, 96 rams were randomized to 0%, 2%, 4%, or 6% AMP, with one sheep per pen selected at the end for muscle sampling (n = 6 per treatment). The paper positions AMP, a traditional herbal feed additive used in Chinese livestock production, as a potential way to influence muscle metabolism, fatty-acid composition, and meat-quality outcomes, while using proteomics and metabolomics to explore how those changes may happen at the tissue level. Broader sheep-feed research has already linked Astragalus supplementation with shifts in rumen metabolism, immunity, antioxidant status, and, in some studies, meat-quality measures, which gives this paper a wider production context. (pmc.ncbi.nlm.nih.gov)
Why it matters: For veterinary professionals working in food-animal practice, the study adds to the growing body of evidence around plant-based feed additives as alternatives or complements to conventional performance strategies. But it’s still an early-stage nutrition and production paper, not a clinical recommendation. The sample used for omics and muscle analysis was relatively small, and the reported outcome is centered on carcass and meat-quality biology rather than flock health, disease prevention, or welfare endpoints. Even so, the work may be useful for veterinarians advising sheep operations on feed programs, residue concerns, product positioning, or the biological plausibility behind herbal additives that producers are increasingly asking about. Multi-omics reviews in small ruminants suggest these methods can help identify biomarkers tied to flavor, texture, fat deposition, and muscle traits, but translating those signals into practical on-farm decisions still takes validation across breeds, diets, and production systems. (mdpi.com)
What to watch: The next step is whether follow-up studies confirm an optimal AMP inclusion rate, show repeatable benefits in larger commercial flocks, and connect these molecular findings to practical health, performance, and economic outcomes. (sciencedirect.com)
Key facts
- Study type
- Animals (MDPI) study
- Species
- Ao-Hu crossbred rams
- Feed additive
- Astragalus membranaceus powder (AMP)
- Trial length
- 70 days
- Sample size
- 96 rams
- Diet groups
- 0%, 2%, 4%, or 6% AMP
- Tissue analyzed
- Longissimus dorsi muscle
- Methods
- Proteomics and metabolomics
A newly published paper in Animals (MDPI) examines whether Astragalus membranaceus powder can alter meat quality and muscle biology in Ao-Hu crossbred rams, using a combined proteomics and metabolomics approach to look beyond carcass traits alone. From the study abstract, the trial enrolled 96 rams assigned to diets containing 0%, 2%, 4%, or 6% AMP for 70 days, then analyzed longissimus dorsi samples from selected animals to identify molecular changes associated with meat-quality differences. (pubmed.ncbi.nlm.nih.gov)
The paper lands in a broader research environment where producers and researchers are looking at herbal and plant-derived feed additives as tools to support productivity, product quality, and, in some systems, reduced reliance on antibiotics or synthetic inputs. Astragalus has been studied in sheep for effects on rumen fermentation, immune markers, antioxidant status, and nutrient metabolism. Earlier sheep studies found that Astragalus root or by-product supplementation could influence rumen microbial activity and immune-related outcomes, while more recent work has used metabolomics to map how Astragalus may reshape microbial and metabolic pathways in lambs. (pmc.ncbi.nlm.nih.gov)
What makes this new paper notable is its focus on muscle-level molecular mechanisms tied to meat quality. The source abstract says the authors used both proteomics and metabolomics to investigate how AMP affected the longissimus dorsi muscle in Ao-Hu crossbred rams, a design intended to move past simple performance readouts and toward pathway-level explanations. That fits with a larger trend in sheep-meat science: recent reviews describe multi-omics as a way to connect diet, genetics, and postmortem muscle biology with outcomes such as tenderness, color, flavor, fatty-acid profile, and product authentication. (mdpi.com)
Even without a press release or substantial outside reaction to this specific paper, there is supporting industry-science context. Other recent Animals studies have tested feed additives in lambs with similar “mechanism plus meat quality” framing. For example, a 2026 paper on coated betaine in crossbred lambs linked supplementation to meat-quality and flavor changes while also examining rumen microbial shifts, underscoring how common this systems-biology approach has become in small-ruminant nutrition research. Likewise, prior Astragalus work in lambs reported enrichment of amino-acid, lipid, and fatty-acid pathways, which gives biological plausibility to the new paper’s focus on fatty acids and muscle molecular profiles. (mdpi.com)
Expert-style interpretation from the literature is cautious rather than promotional. Reviews of omics in sheep and goat meat argue that proteomics and metabolomics are useful for identifying biomarkers and mechanisms, but they also note that these tools don’t automatically translate into field-ready feeding recommendations. In other words, molecular signals can help explain why a diet appears to change meat quality, but they don’t settle questions about dose optimization, consistency across breeds, cost-effectiveness, or whether a given additive improves the outcomes veterinarians care about most in practice, including health resilience, morbidity, and welfare. (mdpi.com)
Why it matters: For veterinary professionals, this is less a practice-changing clinical paper than a useful signal about where food-animal nutrition research is heading. Pet parent language doesn’t apply here, but the same professional principle does: clients increasingly ask about “natural” additives, and veterinarians need a grounded view of what’s evidence-based versus what’s still exploratory. This study adds mechanistic depth to the case that Astragalus may influence carcass and meat-quality biology in sheep, yet it does not establish a standard-of-care feeding recommendation. The trial’s omics sampling appears limited to a subset of animals, and the endpoints are production-focused rather than clinical. (pmc.ncbi.nlm.nih.gov)
There’s also a regulatory and market context in the background. Interest in herbal feed additives has grown alongside pressure to improve efficiency, differentiate animal products, and, in some regions, reduce antibiotic use in production systems. That helps explain why researchers are testing ingredients like Astragalus across lambs, broilers, piglets, and dairy cattle. Still, evidence remains fragmented by species, formulation, dose, and outcome measured, so extrapolation should be careful. (sciencedirect.com)
What to watch: The key next questions are whether the full paper identifies a clearly superior inclusion level, whether independent groups can reproduce the findings in larger and more commercially representative flocks, and whether future studies link meat-quality gains with animal health, feed efficiency, economics, and any residue or labeling considerations relevant to veterinary advisers. (pmc.ncbi.nlm.nih.gov)