Bio-Shield 50B

Prebiotics (Agrimos) – Ingredients like MOS & beta-glucans (Agrimos) feed beneficial gut bacteria.  Help in the production of short-chain fatty acids, which are imperative for the gut barrier integrity.  Beta-glucans help in the immune cells by increasing the cytotoxic activity – helps combat harmful cells.

Probiotics (Boulardii, Levucell, B. subtilis & B. licheniformis) – These are live microorganisms that are considered the good bacteria in the gut.  These microorganisms are essential for the gut microbiome to function properly.  Good bacteria promote a healthy immune system and help strengthen intestinal walls.  It also helps prevent bad bacteria from getting into the blood stream. Probiotics also promote mucus production and balance the gut flora.

Postbiotics (Agrimos) – Are nonliving by-products that come from probiotics or are yeast cultures that don’t have living microorganisms.  They help break down the fiber, bind to toxins to help eliminate them from the body, support a more balanced PH in the hindgut and are thought to have antioxidant properties.

Sources of Saccharomyces Cerevisiae yeast:

• Boulardii – is an active live yeast culture that is microencapsulated. This yeast helps create a positive balance of microflora, which in turn helps tighten the junction between the villi that line and protect the gut barrier and help to prevent leaky gut.
• Levucell Cerevisiae – A different form of this type of yeast (more common) that helps support a diverse gut microbiota and proper digestive PH. Helps support the gut microbiota during traveling and in higher starch diets.  This helps to ensure a healthier hindgut.
• Agrimos (yeast cell wall from saccharomyces cerevisiae) – This is not a live culture but provides consistent levels of MOS and Beta-Glucans. It has binding properties to help block villi attachment and development of potential gut pathogens, recognized as the crowding effect. Helps maintain consistent microflora in the gut.

What exactly is Saccharomyces Cerevisiae Boulardii?

MVP:  an active live yeast culture that is microencapsulated. This yeast helps create a positive balance of microflora, which in turn helps tighten the junction between the villi that line and protect the gut barrier.  Helps improve overall feed efficiency and nutrient absorption (especially for horses on higher starch diets).

What is the difference between Bio-Shield 50 and Gastro-Plex, which should i feed?

MVP: 

Bio-Shield 50B delivers high-level digestive support with a powerful combination of prebiotics, probiotics, and postbiotics to help maintain optimal gut health, immune function, and digestive performance.

It’s a cost-effective, high-impact add-on to any MVP product — even formulas that already contain probiotics or yeast cultures — providing an additional layer of daily microbial support for performance horses under stress, travel, or competition demands.

If your horse is currently experiencing gastric upset or digestive challenges, Gastro-Plex offers focused, targeted support. In addition to probiotic strains and Levu-Cell yeast to help stabilize and nourish the hindgut microbiome, it contains a proprietary herbal blend formulated to soothe and protect the stomach lining. Added glutamine supports gut tissue repair, while mannanoligosaccharides (MOS) help reinforce gut integrity and immune function—making it an ideal choice during times of stress, travel, training, or dietary change.