Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Lactococcus casei is a species of lactic acid bacteria commonly found in the human gut and used in the fermentation of dairy products. Its use in supporting the small intestines, specifically digestive health, has some scientific backing. Several studies indicate that certain strains of L. casei can survive gastrointestinal transit and may positively influence the gut microbiota. For example, research published in Applied and Environmental Microbiology and Beneficial Microbes has shown that L. casei supplementation can enhance the balance of beneficial bacteria, support intestinal barrier function, and reduce the duration of some types of diarrhea. Additionally, some clinical trials suggest that L. casei may help mitigate symptoms of lactose intolerance and modulate immune responses in the gut.

However, much of the research is strain-specific (e.g., L. casei Shirota) and results can vary depending on the population studied and the endpoints measured. While there is moderate evidence supporting its use for improving aspects of small intestine function—especially in the context of digestive balance and mild gastrointestinal disturbances—more large-scale, high-quality human studies are needed to confirm these benefits across broader applications. Nevertheless, the use of L. casei in functional foods and supplements targeting small intestine health is scientifically plausible and partially validated by current evidence.

More about Lactococcus casei
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Other body systems supported by Lactococcus casei

Digestive System
Gastrointestinal Tract
Immune System
Intestinal System
Large Intestines (Colon)
Peyer’s patches
Small Intestines
Stomach

Products containing Lactococcus casei

We currently have no products on Vitabase that contain this ingredient.