Prebiotics vs Probiotics, Presented by Kentucky Performance Products
Do you know the difference between prebiotics and probiotics? And does it really matter?
Photo courtesy of Kentucky Performance Products
The terms probiotic and prebiotic are showing up more and more often on feed bags and supplement labels. But what do these terms really mean? Is one better than the other? For many, it is a real mystery.
The logical place to start is by clearly defining each term. Most scientists agree that the term prebiotic refers to selective ingredients that support the growth of the microbes that reside in the horse’s gut. In very simple terms, prebiotics serve as food for the microbes.
Probiotics, on the other hand, are living microorganisms, which reach the intestine in an active state and thus exert positive health effects upon the horse’s intestinal tract, immune system, and the intestinal microflora.
Probiotics and prebiotics are not the same, and depending on the reason you are using them, not interchangeable terms. It is important to know the difference between the two so that you can choose the correct ingredient to address your horse’s problem.
Taking a Closer Look at Prebiotics
One of the most commonly found ingredients on feeds and supplements claiming probiotic benefits is Saccharomyces cerevisiae. However, S. cerevisiae is not a true probiotic. Many researchers contend that S. cerevisiae should not be considered a probiotic because it does not reach the intestinal tract in a viable (live) state. S. cerevisiae does support the healthy functioning of other microorganisms within a horse; however, there is limited research that suggests S. cerevisiae directly modifies the health and well-being of the horse itself. Given this information, S. cerevisiae fits the definition of a prebiotic, and cannot be classified as a probiotic.
Common prebiotics used in the horse nutrition industry are derived from components of lysed yeast cell walls, the primary components of which include mannon oligosaccharides (MOS) and beta-glucans. These substances have demonstrated the ability to bind with strains of harmful bacteria such as E. coli, Campylobacter and Salmonella, helping to flush them out of the horse’s system.
By selectively supporting the beneficial populations and activities of the residential bacteria, while simultaneously shuttling harmful pathogens out of the intestinal lumen, prebiotics work double duty to ensure a balanced and healthy microbial population.
Benefits of a True Probiotic
Recently a new probiotic has arrived on the equine scene, Saccharomyces boulardii. S. boulardii is recognized as a true probiotic. The key to the success of S. boulardii is that it remains viable in the gastrointestinal tract. S. boulardii not only benefits the microbial population, it directly impacts tissues and cellular functions of the horse. Herein lies the therapeutic value of S. boulardii to the equine host.
S. boulardii does not naturally reside in the horse’s GI tract, so it must be provided in the diet. Since it does not persist past several days, administration needs to be continual so as to optimize its benefits.
S. boulardii mitigates the adhesion of pathogenic bacteria such as Salmonella and E. coli to the tissues of the intestines much in the same way a prebiotic does, by binding to them and flushing them out of the system. However, S. boulardii administration goes one step further and reduces or stops chronic and acute diarrhea by binding up the toxins produced by Clostridium difficile (a major contributor to equine diarrhea).
S. boulardii secretes factors while moving through the gastrointestinal tract that improve the functionality of and expedite healing of the intestinal lining and enteroluminal spaces.
S. boulardii stimulates the enzymes that play a role in sugar and starch digestion in the small intestine, thus reducing the amount of pass-through starches and sugars that negatively affect the microflora in the hind gut.
This all suggests that S. boulardii is more than a preventative agent but also plays an active role in supporting a healthy intestinal environment—the hallmark of a true probiotic.
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