Bifidobacterium adolescentis

Probiotic

What is it

Bifidobacterium adolescentis is a species of bacteria commonly found in the human gut, particularly in adults. It is used as a probiotic ingredient in some supplements, often in multi-strain blends.

Evidence for 1 use

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Gut microbial support

Limited Evidence

B. adolescentis is a normal adult gut species and is generally well-tolerated. Specific clinical outcomes in trials depend on the strain used; benefits for IBS and inflammation have been suggested but evidence is mixed.

How it works

B. adolescentis ferments dietary fibers and produces short-chain fatty acids (acetate, propionate, butyrate) that feed colon cells and contribute to gut barrier function. Some strains are notable for producing GABA, a neurotransmitter that has been studied for mood and sleep. Like all probiotics, effects are strain-specific. Research has explored uses in IBS, anxiety, and metabolic health.

Dosage

Probiotic doses depend on the strain and product, typically 1-10 billion CFU per day for B. adolescentis-containing formulations.

When and how to take it

Often taken once daily with or just before a meal. Specific timing varies by product.

1 commercial form

Compare the main delivery options and what they’re best suited for.

Live B. adolescentis (strain-specified)

Used in multi-strain probiotic blends.

Live CFU should reach the colon

Safety

Generally regarded as safe for healthy individuals. Severely immunocompromised people or those with central lines should consult a clinician before using any live probiotic.

Who should be cautious

Severely immunocompromised individuals, neonates with short bowel syndrome, or critically ill hospitalized patients should not use without medical guidance. Generally safe in pregnancy and breastfeeding.

Interactions

No significant drug interactions. Antibiotics can reduce live probiotic viability if taken at the same time; separate by a few hours.

Food sources

Some fermented foods (varies by culture)

Amount
varies
%DV
—

Frequently asked questions

Is B. adolescentis the same as B. longum?⌄

No. They are different Bifidobacterium species with different properties.

Will it make GABA in my gut?⌄

Some strains of B. adolescentis can produce GABA. Whether this produces meaningful effects on mood depends on the strain and the rest of the microbiome.

References

Bifidobacterium adolescentis on Wikidata — Wikidata link

Bifidobacterium adolescentis on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Bifidobacterium adolescentis (PubMed search) — PubMed link

Track Bifidobacterium adolescentis with Pilora

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Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.