Probiotic
Bifidobacterium lactis
Also known as: B. lactis, B. animalis subsp. lactis, BB-12, HN019
Hardy probiotic strain with strong immune-enhancing effects. Survives transit well and supports regularity.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Common questions
How much Bifidobacterium lactis should I take?
The typical range is 1-10 billion CFU daily. Safe long-term
When should I take Bifidobacterium lactis?
Any time. Either way.
Which form of Bifidobacterium lactis is best?
Capsules — Common in blends. Other forms in the catalog: Dairy products.
Is Bifidobacterium lactis safe?
Commonly reported: Minimal. Serious warnings: Standard cautions. Safe
Which Bifidobacterium lactis supplement scores highest?
Thorne FloraSport 20B®, at 86/100. Scored on dose accuracy, form, label transparency and third-party testing — no brand pays to be listed or ranked.
Primary uses
- Immune support
- Regularity
- Gut health
What systematic reviews concluded
Outcomes that systematic reviews of Bifidobacterium lactis reached a verdict on: 4 with a benefit, 4 unclear. Each is quoted from a review and linked to it on PubMed. How these were read.
Reviews found a benefit (4)
“significantly reduced the duration of diarrhea when compared with placebo.” PMID 34959871
“B. lactis Bb-12/B94 could reduce NEC risk with a different size effect according to feeding type.” PMID 33435456
“B. animalis subspecies lactis supplementation may increase defecation frequency and, in short-term treatment, may reduce CTT in healthy adults and improve stool consistency in individuals without GIS.” PMID 34918142
“short-term probiotic supplementation decreases ITT with consistently greater treatment effects identified in constipated or older adults and with certain probiotic strains.” PMID 23922468
Not enough to say: constipation; abdominal pain; ibs quality of life, depression, and anxiety; postoperative infections and complications.
3 findings from reviews in specific patient groups (such as cancer, pregnancy or surgery) are not shown here.
How it works
- Survives GI transit well
- Enhances immune cell activity
- Supports bowel regularity
Dosage
- Typical range
- 1-10 billion CFU daily
- Timing
- Any time
- With food
- Either way
- Duration
- Safe long-term
- Special populations
- Immune support, constipation
Forms
- Capsules
- Dairy products
Safety
Common side effects
- Minimal
Contraindications
- Severe immunocompromise
Products containing Bifidobacterium lactis
Top-scoring supplements in our catalog that list Bifidobacterium lactis on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Evidence notes
Robust strain with immune benefits
Grade B: Some human trials support key claims; further confirmation needed.
Related in Probiotic
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.