- Kingdom published a second peer-reviewed study on its Superculture Pet Immune postbiotic ingredient.
- The placebo-controlled study reported significant improvements in stool quality in dogs after 28 days.
- Half of dogs receiving the ingredient showed improvement, compared with 10% in the placebo group.
- Researchers also observed changes in gut microbiome composition among treated dogs.
- Kingdom said the ingredient now has published evidence supporting stool quality, skin and coat health, itch reduction and microbiome diversity.
- The ingredient is already being incorporated into products from multiple pet wellness brands.
Kingdom announced publication of a second peer-reviewed study evaluating its Superculture Pet Immune ingredient, adding new clinical evidence supporting the postbiotic’s impact on canine gut health and stool quality.
The study, published in the journal Pets, found that dogs receiving the ingredient experienced statistically significant improvements in stool consistency within 28 days compared with placebo-treated dogs.
Study Evaluates Stool Quality Improvements
The placebo-controlled study examined healthy dogs experiencing loose stools and assessed the effects of Superculture Pet Immune over a 28-day period.
According to Kingdom, 50% of dogs in the treatment group demonstrated improvement in stool quality compared with 10% of dogs in the placebo group. Researchers used the Waltham Fecal Score, an industry-standard stool scoring system, to evaluate outcomes.
The company also reported that key gut health markers — including fecal pH, dry matter, immunoglobulin A, calprotectin and short-chain fatty acids — remained within healthy ranges throughout the study.
Additional Evidence for Microbiome Support
Kingdom said the latest publication builds on an earlier peer-reviewed study involving Superculture Pet Immune that examined skin and coat health, occasional itching and gut microbiome diversity.
Researchers reported changes in 16 gut bacterial populations among dogs receiving the ingredient, compared with one bacterial change observed in the placebo group.
Company scientists said the findings support microbiome modulation as a central mechanism of the ingredient’s effects.
Growing Demand for Evidence-Based Pet Wellness
Kingdom positioned the publication as part of a broader shift toward clinically validated pet wellness products as pet owners increasingly seek science-backed nutrition and preventive health solutions.
The company said Superculture ingredients are currently being used by multiple pet product brands, including Dinovite, Native Pet and Woof.
Kingdom added that one product containing Superculture Pet Immune was recently recognized among top new dog products at the 2026 Global Pet Expo.
Information sourced from Kingdom’s press release issued May 6, 2026.
