Interest in microbiome-focused nutrition is growing rapidly in the beef industry. With pressure to reduce antibiotic use and improve feed efficiency, prebiotics — non-digestible feed substrates that selectively nourish beneficial microbes — are gaining traction as practical, evidence-based tools to support health and performance.
This is the second installment of the Biotics in Bovines series where we will explore the role and application of prebiotics, probiotics and postbiotics in dairy and beef cattle nutrition. Each installment will examine a different facet of microbiome-focused nutrition from how these products work to what recent research says about their effectiveness and on-farm value. The goal is to help veterinarians and producers make informed, evidence-based decisions about integrating biotic feed technologies into herd health and performance programs.
Check out the first installment here: Biotics in Bovines: Prebiotic Applications for Dairy Cattle
Prebiotics are typically non-digestible carbohydrates, such as mannan-oligosaccharides (MOS), fructo-oligosaccharides (FOS) and beta-glucans sourced from yeast cell walls, yeast culture and agro-industrial wastes. These compounds act as selective fuel sources for beneficial gut microbes but can also support gut barrier integrity, reduce colonization by pathogens and enhance volatile fatty acid production, particularly butyrate, which fuels intestinal cells.
In beef cattle, the primary goals of prebiotic supplementation are to improve growth rates and feed efficiency, allow for better health during periods of stress (weaning, transport, feedlot entry), improve carcass quality and reduce incidence of digestive upsets.
Evidence in Beef Cattle
Recent trials show prebiotics can support growth, gut health and immune development in young beef animals. In a group of grazing beef calves, supplementation with a beta-glucan concentrate increased average daily gain, especially in the first month after weaning. Further, these animals had increased fiber digesting bacteria and decreased methane producing bacteria in the rumen.
In growing beef cattle, hydrolyzed yeast supplementation (containing MOS and beta-glucans) has been linked to improved nutrient digestibility and increased rumen fermentation efficiency, but reports on growth performance are variable.
Prebiotics can play a stabilizing role during diet transitions and periods of stress; however, these are often offered as a prebiotic/probiotic combination. During feedlot adaptation, cattle offered a probiotic-yeast derived prebiotic blend for the first 45 days have been shown to have an improved response to bovine respiratory disease treatment, but no changes in growth performance were observed. The lack of observed growth response in probiotic supplemented cattle is consistent across multiple studies.
In general, the research available on the application of prebiotics alone in beef cattle is slim. However, it’s not unreasonable to think that similar positive growth and development results seen in dairy calves could also be observed in beef calves. A combined synbiotic approach could prove best for beef cattle.
Practical On-Farm Guidance
- Choose products with proven data. Select prebiotics backed by published trials in cattle. Look for specific strain or compound data (e.g., MOS from Saccharomyces cerevisiae, FOS derived from chicory root) so you know what you’re feeding.
- Match product type to production phase.
- Cow-calf: MOS and yeast cell wall products in creep feed or milk supplements can enhance calf gut health and reduce pathogen pressure.
- Backgrounding: Prebiotics in growing diets can support cattle through diet transitions.
- Feedlot: Combine prebiotics with probiotics during step-up and finishing phases to maintain feed intake and reduce acidosis risk.
- Track measurable outcomes. Evaluate fecal consistency, feed intake, average daily gain and treatment frequency. Measuring inflammatory markers, such as haptoglobin or fecal calprotectin, can also be valuable.
- Integrate, don’t isolate. Prebiotics work best as part of a whole-system nutrition plan alongside consistent feeding, low-stress handling and proper bunk management.
Limitations and Research Gaps
While early findings are promising, prebiotic effects in beef cattle remain variable. Many compounds degrade in the rumen, limiting their reach to the hindgut. Responses also depend heavily on diet composition, environmental stress and microbial diversity. Large-scale, multilocation beef trials are still needed to define cost-benefit relationships and standardize effective doses.
Actionable Takeaways
- Start with the cow-calf phase. That’s where prebiotics have the strongest evidence base for improving gut health and reducing pathogen load.
- Trial prebiotics in controlled groups. Compare average daily gain, fecal health and treatment rates to establish a farm-specific return on investment.
- Expect incremental, not dramatic gains. Prebiotics are performance stabilizers and health promoters, not growth promoters.
- Monitor consistency. Benefits fade if feed intake or product delivery is erratic.
