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Interpretive Summary: The effects of torula yeast as a protein source on apparent total tract digestibility, inflammatory markers, and fecal microbiota dysbiosis index in Labrador Retrievers with chronically poor stool quality

By: Claire L Timlin, Sarah M Dickerson, Jason W Fowler, Fiona B Mccracken, Patrick M Skaggs, Ricardo Ekmay, Craig N Coon

Pet and human populations continue to grow and compete for nutritious, sustainable protein sources. The incorporation of alternative proteins like torula yeast can provide a solution to this problem. Torula yeast also may have additional health benefits like reducing gut inflammation. To test its effects in dogs, we fed Labrador Retrievers with chronically poor stool quality either a control diet with chicken meal, a diet with 10% brewer’s yeast, or a diet with 10% torula yeast. We compared their responses to dogs with normal stool quality fed the control diet. Dogs with chronically poor stool quality had lower body weights and increased systemic inflammation compared to those with good stool quality. Calprotectin, a marker of gut inflammation, was reduced more in dogs fed torula yeast than in dogs fed chicken meal. Torula and brewer’s yeast also changed the abundance of certain gut bacteria. Torula yeast may be added to dog diets with no negative effects and can alter the gut environment in Labrador Retrievers with chronically poor stool quality.

Read the full article in the Journal of Animal Science.