A core human probiotic strain that promotes gut-brain axis balance, reduces stress response, and maintains bowel regularity.
What it is
Bifidobacterium longum is a fundamental symbiotic bacterium colonising the human gastrointestinal tract from infancy through elderly age. Manufactured via industrial fermentation and lyophilisation, B. longum is celebrated for its antioxidant and neuro-active metabolite production. Formulated within Velobiotics products, B. longum benefits from patented MEP lipid microencapsulation, which insulates live bacteria against stomach acid and bile acids, ensuring high delivery rates to the colonic epithelium.
Also known as: B. longum
What it does
- Supports gut-brain axis communication and psychological stress resilience.
- Helps maintain regular bowel function and digestive comfort.
- Neutralises reactive oxygen species in the intestinal lumen.
- Promotes balanced systemic and mucosal immune responses.
Amplified by probiotics
Bifidobacterium longum exerts multifactorial synergy within multi-strain probiotic matrices. It ferments a wide range of complex plant carbohydrates, producing acetate and lactate that maintain an acidic colonic pH. This acidic environment inhibits putrefactive bacteria while fostering companion species like Lactobacillus reuteri and Lactobacillus plantarum. B. longum produces tryptophan-derived metabolites and short-chain fatty acids that signal through the vagus nerve and enteric nervous system, supporting emotional well-being and gut motility. Co-cultivation with Lactobacilli enhances mucosal adhesion and tight junction gene expression. Protected by Velobiotics MEP microencapsulation, intact B. longum strains colonise intestinal crypts, dampening inflammatory signaling and improving overall intestinal mucosal health.
Typical dose
1–10 billion CFU/day
The evidence
Evidence: strongNumerous clinical trials show that Bifidobacterium longum attenuates psychological stress symptoms, lowers cortisol levels, and improves gut comfort in irritable bowel syndrome. Systematic reviews confirm its efficacy in modulating enteric neuro-immune signaling and maintaining microflora balance. (Watters SIN 2026, Nutrients) (Huang Y 2026, Front Cell Infect Microbiol) (Chen R 2026, Gut Microbes)
- Watters SIN, et al. Sourdough Bread and Baker's Yeast Bread Affect Gut Symptoms and Targeted Gut Microbial Taxa Differently: A Randomised Controlled Trial. Nutrients. 2026;18: PubMed ↗
- Huang Y, et al. Effect of perioperative multistrain probiotics on the CT callus volume fraction at 12 weeks after surgery for closed tibial shaft fracture: a single-center randomized controlled study. Front Cell Infect Microbiol. 2026;16:1778557 PubMed ↗
- Chen R, et al. Gut microbiota and metabolic alterations in participants with flatulence identify Faecalibacterium prausnitzii as a key microbial target for clinical intervention. Gut Microbes. 2026;18:2728332 PubMed ↗
Safety & who should check first
Bifidobacterium longum is safe and extremely well tolerated in pediatric, adult, and geriatric populations. Minor transient gas may occur during initial use; no drug contraindications are known.