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Gut Balancer Powder

Gut Balancer Horse Hindgut Support Supplement - 3.3lbs (1.5kg) Powder

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Gut Balancer Horse Hindgut Support Supplement

  • Supports gut health & aids digestion
  • Balanced combination of Pre and Pro-Biotics
  • Optimum levels of protected live yeast
  • WINNER of the BETA International Innovation Awards
  • Results seen in as little as 48 hours
  • 3.3lb (1.5kg) tub gives approximately 1-month supply
Product Description:

Winner of the BETA International Innovation Awards, the all new and improved Gut Balancer is a balanced combination of Pre and Pro-Biotics and contains a specially protected live yeast (Saccharomyces cerevisiae) at very high levels, which ensures that high enough numbers of live yeast cells reach the hindgut to beneficially influence hindgut function rapidly and effectively. The yeast inside each granule is protected from acidity, heat, and moisture by a layer of dead yeast cells to enhance stability of the yeast, meaning that more yeast cells reach the hindgut alive. Micro-organisms which have a beneficial effect on health when eaten (such as yeast) are often referred to as probiotics; when translated this means literally "for life". Gut Balancer also contains a source of prebiotics, including mannanoligosaccharide (MOS), fructooligosaccharides (FOS) and betaglucans, which help stimulate the growth of good bacteria, promote the immune functions of the GI tract, bind mycotoxins produced by fungal contamination of feed, and positively influence the pH and help stabilize the microbial population of the hindgut. In two studies, improvement in fecal scores were seen in just 7 days.


Unlike humans, horses rely heavily on fermentation by a number of different species of bacteria to digest plant material in the large intestine. Changes in diet, deworming, antibiotic use, stress, and exercise can lead to imbalances between the different species of bacteria, which in turn can upset the environment in the hindgut and cause overgrowth of bad bacteria. Fungal toxins (mycotoxins) which are common feed contaminants - but difficult or impossible to detect without laboratory testing - can lead to growth impairment, poor condition, poor health, and poor performance. In the hindgut, probiotics like the specific species of yeasts found in GutBalancer, if fed in sufficient amounts and in a formulation that ensure they survive the conditions in the stomach and small intestines, can influence the balance between good and bad bacterial species. The benefits of providing probiotics includes stabilization of the conditions in the large intestine - resulting in the stimulation of natural fermentative activity, improved fiber digestion to help realize and unlock potential nutrients from forages, and aiding the overall efficiency of digestion.

Gut Balancer should be fed on a daily basis to help support a healthy Gastrointestinal (GI) tract and to help support overall health and aid digestion. It is also ideal for older horses, poor doers, and horses and ponies that lose condition or have a hard time gaining or maintain weight. Gut Balancer may also be fed to horses or ponies at times of increased stress, travelling, competition, change of housing, or a change in hay or feed.

Instructions for Use & Feeding Guide:

Use the 25ml (16.7g) scoop provided

Maintenance                                      Level 25ml (16.7g) scoops per day
Pony - approximately 650lbs              2
Horse - approximately 1000lbs          3
Large Horse - over 1300lbs                4

For horses requiring additional gut support or who don’t improve under the maintenance dose after 7 days, therapeutic dosing levels can be given for 7 days.

Therapeutic                                        Level 25ml (16.7g) scoops per day
Pony - approximately 550lbs              4
Horse - approximately 1100lbs          6
Large Horse - over 1650lbs                8

-This product is highly concentrated and has a strong taste. For fussy feeders introduce slowly or mix with a small amount of molasses or apple sauce.

-Split between meals where possible. 

-Do not exceed the recommended intake

Ingredients & Composition: 

One of our core values is transparency. That’s why we list all the active ingredients per daily feeding rate so you know exactly what your horse is getting.

Active Ingredients
Per 1000lb maintenance dose (3 x 25ml) 50g Gut Balancer delivers: 20g protected live yeast (equivalent to 2.0 x 1011 CFU),10g fructooligosaccharides (scFOS), 5g mannanoligosaccharides (MOS) and betaglucans.

Analytical Constituents:
Crude Ash 3%; Crude Protein 19.8%; Crude Fiber 17.7%; Crude Oils & Fats 2.9%; Moisture 6.3%; Sodium <1%; Calcium <1%; Phosphorus <1%.

Fructooligosaccharides (FOS) from sugar beet, yeast cell walls from Saccharomyces cerevisiae, rice flour.

Additives (per kg of finished product):
Zootechnical additives: Digestibility Enhancer: Saccharomyces cerevisiae NCYC Sc47 (4b 1702) 4.0 x 1012 CFU.

Research (impact on fecal scores):

QUESTION: Is a live yeast probiotic and MOS/betaglucan prebiotic beneficial to horses with hindgut dysfunction?


  • Dysfunction and disease of the gastrointestinal (GI) tract is common in horses with colic being the most severe1-3. Identified risk factors for colic include change in stabling conditions, recent change in diet and level of activity, decreased exposure to pasture, lack of access to water and transport3,4.
  • Low-grade hindgut disturbance and change in hindgut microbial populations can be caused by high starch diets and abrupt dietary change4-6. Such shifts in microbial populations can decrease the efficiency of food digestion5 and the metabolism and absorption of vitamins and minerals.
  • Yeast has been proposed to support GI microbial populations in a number of species, reducing the risk of GI problems, acidosis and increasing digestibility7. Similarly, yeasts may be able to beneficially modify large intestine function in the horse5,6,8,9.

Aim of Study

To develop a nutritional supplement (Gut Balancer, Science Supplements) supporting hindgut function in the horse. Primary requirements in development of the supplement were effectiveness and safety.

Study Design

  • Prospective clinical case series = a group of horses selected for a particular reason (loose droppings in this study) was followed over several weeks.

Study Outline

Twenty-nine horses with chronic (over 4 weeks) loose droppings were recruited. Loose droppings were chosen as an indirect measure of large intestinal function/dysfunction as they require no owner intervention and are readily observable. It was hypothesized that improvement in large intestinal function would be reflected by better consistency droppings. Owners recorded fecal consistency each day using a simple 5-point scale for scoring the consistency of the droppings (0 liquid; 1 semi-liquid; 2 soft; 3 normal; 4 hard). Each score was accompanied by a photo to try to improve consistency in scoring over time and between different owners taking part in the trials. Owners were instructed to feed 40g of live yeast probiotic and MOS/betaglucan prebiotic (Gut Balancer) per day, split between two feeds. If no change in fecal score was observed in 7 days, 80g of Gut Balancer (2 x 40g) was administered daily for a further 7 days.

Study Results

  • Improved fecal consistency within 7 days was reported for 24/29 (83%) horses with loose droppings. Fecal scores were significantly improved after 2 days of feeding Gut Balancer (Figure 1).
  • Normal fecal consistency was achieved in 15/29 (52%) horses. Five horses (17%) did not respond with a change in dropping score in the first 7 days. These horses were fed 80g supplement daily for a further 7 days resulting in 4/5 (80%) producing normal droppings.
Graph of change in fecal scores over 7 days

Figure 1. The effect of feeding Gut Balancer (40g per day) on median owner-recorded fecal score in 29 horses with loose droppings. Fecal score: 0 liquid; 1 semi-liquid; 2 soft; 3 normal; 4 hard. * shows significant difference in median fecal score from pre-trial (P<0.03).


  1. Ireland et al., Factors associated with mortality of geriatric horses in the United Kingdom. Preventive Vet. Med. 2011. 101(3):204-218.
  2. Tinker et al., Prospective study of equine colic incidence and mortality. Equine Vet J. 1997. 29(6): 448-453.
  3. Cohen Epidemiology of Colic. Veterinary Clinics of North America: Equine Practice, 1997.13(2):191-201.
  4. Hudson et al. Feeding practices associated with colic in horses J Am Vet Med Assoc 2001. 219:1419–1425
  5. Salem et al. Influence of Feeding Horses a High Fibre Diet With or Without Live Yeast Cultures Supplementation on Feed Intake, Nutrient Digestion, Blood Chemistry, Faecal Coliform Count, and In Vitro Faecal Fermentation. J Equine Vet Sci. 2016. 39:12-19.
  6. Grimm et al. Effect of yeast supplementation on hindgut microbiota and digestibility of horses subjected to an abrupt change of hays. Livestock Sci. 2016.186:34-40.
  7. Chaucheyras-Durand and Durand Probiotics in animal nutrition and health. Beneficial Microbes 2010 1:1, 3-9
  8. Proudman et al. Racehorse faecal metabolome and microbiome. Equine Vet J. 2015. 47: 580-586.
  9. Jouany et al. Effect of live yeast culture supplementation on apparent digestibility and rate of passage in horses fed a high-fibre or high-starch diet. J Animal Sci. 2008. 86(2):339–347.
Research (affect on microbial population with abrupt diet change): 

QUESTION: Does yeast supplementation have a beneficial effect on equine fecal microbial populations following abrupt dietary changes?

Abstract presented by Anna Garber and Prof Jo-Anne Murray, University of Glasgow, at the Equine Science Society conference in North Carolina, June 2019

Available at https://www.sciencedirect.com/science/article/pii/S0737080619302072


  • Abrupt dietary change can affect the fecal microbial population (microbiome) and can increase the risk of colic and laminitis1-3.
  • Better understanding of this microbial population may help to prevent gastrointestinal disturbances.

Aim of Study

To investigate the effect of yeast supplementation on the fecal microbiome during an abrupt change from hay to grass and vice versa.

Study Design

  • Randomised = which horses were assigned to be controls or treatment ponies was pre-determined by a random system rather than a person deciding at the time of seeing a horse. This removes bias in the results caused by selecting only certain horses to have a particular treatment.
  • Blinded = none of the people assessing the horses knew which horses received the yeast supplement. Blinding removes bias caused by people wanting to see a positive effect with the supplement.

Study Outline

Eight mature Welsh geldings were used in the study, randomly allocated into 4 control ponies and 4 treatment ponies. Before the experiment the ponies were kept at grass and on day 0 were transferred from grass to hay. The experiment consisted of 3 sequential 14-day periods of feeding hay, then grass, then hay ad lib. All ponies were additionally fed 100g concentrates and 25ml molasses throughout the experiment. Treatment ponies also received 25g of yeast/day as a supplement (Gut Balancer, Science Supplements) which provided 20g of live yeast S. cerevisiae equivalent to 2.1x1011 CFU and 1g of yeast cell walls. Control ponies received no yeast. At the end of first 14-day hay feeding period ponies were abruptly transitioned to grass for 14 days and then back to hay for a further 14 days (Fig 1). Fecal samples were collected on days 1-3, 7 and 14 following each abrupt dietary change and frozen for molecular bacterial identification.

Diagram of study design periods and sampling days

Figure 1: Outline of study detailing diet and interventions of 8 Welsh gelding ponies throughout 3, 14-day roughage feeding periods. ↓ denotes a fecal sample was taken (days 1-3, 7 and 14 following change in diet). Control ponies (n=4) and Treatment ponies (n=4) were fed 0g and 20g yeast respectively.


  • Yeast significantly increased the amount of the most abundant bacterial group, Bacteroidetes in periods 1 and 2, which is a group associated with positive energy balance and is known to typically decrease after abrupt changes in diet.

Take Home Message

  • Supplementation with Gut Balancer maintained higher levels of Bacteroidetes following abrupt dietary change. This bacterial group is associated with positive energy balance, and is known to decrease after abrupt changes in the diet.
  • Feeding Gut Balancer supports a more stable fecal microbial structure.


  1. Hudson et al. Feeding practices associated with colic in horses J Am Vet Med Assoc 2001. 219:1419–1425
  2. Salem et al. Influence of Feeding Horses a High Fibre Diet With or Without Live Yeast Cultures Supplementation on Feed Intake, Nutrient Digestion, Blood Chemistry, Faecal Coliform Count, and In Vitro Faecal Fermentation. J Equine Vet Sci. 2016. 39:12-19.
  3. Grimm et al. Effect of yeast supplementation on hindgut microbiota and digestibility of horses subjected to an abrupt change of hays. Livestock Sci. 2016.186:34-40. 
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