Bifidobacterium animalis is a probiotic bacterium commonly included in supplements and certain yogurts. There is a moderate scientific basis for its use in supporting gastrointestinal health, specifically in the context of gas and bloating. Clinical trials, particularly with the subspecies Bifidobacterium animalis subsp. lactis (often found in products like Activia®), have shown that supplementation may help reduce symptoms of bloating and improve overall gut comfort in individuals with mild digestive complaints and irritable bowel syndrome (IBS).

Randomized, placebo-controlled studies have demonstrated that B. animalis can influence colonic transit time and modulate the gut microbiota, leading to decreased gas production and improved stool frequency and consistency. For example, a double-blind trial published in Alimentary Pharmacology & Therapeutics (2011) found that daily consumption of B. animalis subsp. lactis DN-173 010 led to a statistically significant improvement in bloating and digestive discomfort compared to placebo. Meta-analyses of probiotics for functional gastrointestinal symptoms also support a small but significant benefit for bifidobacteria in general, though results are not universally consistent and effects may vary between individuals and probiotic strains.

In summary, while not every person will benefit and larger, more standardized studies are needed, the scientific evidence justifies the use of Bifidobacterium animalis to support relief from gas and bloating, particularly in functional GI disorders.