Probiotics

Bifidobacterium

Also called: bifidus, B. longum, B. infantis

A group of probiotic bacteria common in the gut.

Why people take it
IBS, gut health.
What the evidence says
Some strains help IBS symptoms; effects depend on the strain.
How it is usually taken
Usually 1 to 10 billion CFU a day.
Be careful
Generally safe in healthy people.
Medicines it can interact with
Antibiotics reduce its effect.

Other probiotics

Lactobacillus rhamnosus GGSaccharomyces boulardiiKefirKombucha

Common questions

What is Bifidobacterium?

A group of probiotic bacteria common in the gut.

Why do people take Bifidobacterium?

IBS, gut health.

Does Bifidobacterium work?

Some strains help IBS symptoms; effects depend on the strain.

How much Bifidobacterium do people take?

Usually 1 to 10 billion CFU a day.

Is Bifidobacterium safe?

Generally safe in healthy people.

Does Bifidobacterium interact with medicines?

Antibiotics reduce its effect.

Sources and further reading

Last reviewed 31 October 2026. Written by Satya Babu.

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For information only, not medical advice. Supplements are not medicines: they are not tested and approved like drugs before they are sold, and they can interact with medicines. Talk to your doctor or pharmacist before you start one, especially if you are pregnant or breastfeeding, take regular medicines, or have kidney, liver or heart disease.