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Bacteria

Bifidobacterium breve

Bifidobacterium breve is a bacterial species that lives naturally in the human gut, especially in infants, and is used in probiotic products.

What it is studied for

The strongest rated effects first. Bars show the size of the effect, the letter grades the evidence, and each rating lists the studies behind it.

Immune SupportModerateBNo linked study
Microbiome healthGut HealthModerateBNo linked study
Histamine & Immune BalanceImmune SupportModerateBNo linked study
Digestive sensitivityGut HealthModerateBNo linked study
Gut healthModerateBNo linked study
ConstipationModerateBNo linked study
All 8 rated effectsGrouped by health goal, with the publications behind each rating

Which B. breve are we talking about?

Research has tested B. breve M-16V in a bacterial mixture for childhood constipation and B-3 alone for body fat in adults. These are different interventions addressing different questions. 1 2

Why people take it

Gut Health26%
Immune Support25.8%
Essential Health22.6%
Detox8.9%
Energy6.4%
Women's Hormones2.6%

SuppCo community snapshot, 2026-09-28. Reasons for use are not evidence that it works.

Questions people ask

Can B. breve replace a laxative?

The constipation trial tested the mixture alongside polyethylene glycol, not as a replacement. 1

Are supplements with more strains better?

A benefit from including many rather than fewer strains remains uncertain, according to German consumer guidance. 3

How should a live product be stored?

Storage instructions vary: some probiotic products need refrigeration and others do not. The label provides the relevant instructions. 4

Sources

  1. Probiotics: Fact Sheet for Consumers NIH Office of Dietary Supplements