Synopsis

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

Bacillus subtilis is a spore-forming probiotic bacterium that has been investigated for its role in supporting the health of the small intestine. Scientific studies, including both animal and human trials, have shown that B. subtilis can positively modulate gut microbiota, enhance barrier function, and support immune responses in the intestinal tract. Its spores are resistant to stomach acid, allowing them to reach the small intestine intact, where they can germinate and exert their effects.

Several randomized controlled trials have demonstrated that supplementation with B. subtilis may help reduce symptoms of gastrointestinal discomfort, such as bloating and irregular bowel movements, particularly in individuals with mild digestive disturbances. Mechanistically, it appears to compete with pathogenic bacteria, produce antimicrobial compounds, and stimulate mucosal immunity, which can contribute to a healthier small intestinal environment.

However, the body of evidence in humans is still moderate, with more robust and long-term studies needed to fully establish its benefits for specific small intestine-related conditions. Regulatory authorities such as the European Food Safety Authority (EFSA) recognize B. subtilis as safe for use as a probiotic, but health claims are typically limited due to the variability in clinical outcomes. Overall, the use of Bacillus subtilis to support small intestinal health is grounded in scientific evidence, though it is not yet regarded as conclusive or universally applicable.

More about bacillus subtilis
More about Small Intestines

Other ingredients that support Small Intestines

Other body systems supported by bacillus subtilis

Products containing bacillus subtilis

Vitabase 7 Day Colon Cleanse
Thorne FloraSport 20B NSF
Douglas Laboratories Multi-Probiotic Spore
Designs For Health ProbioSpore™
Vitabase Probiotic Blend
Metagenics UltraFlora® 3 in 1 Daily Probiotic