Bifidobacterium lactis

Highly researched probiotic bacteria that supports digestive health, immune function, and may improve lactose digestion and regularity

Scientific nameBifidobacterium animalis subsp. lactis FormulaLive bacterial culture Molecular weightN/A - Living organism g/mol CASN/A - Probiotic strain

85 absorption score

10 safety / 10

25 USD per month

6 documented interactions

Check it against something

No documented links

Bifidobacterium lactis with:

70 out of 100

No known interaction No documented interaction. Standard timing for each applies.

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What it does

mechanism and evidence for each claim

Improved digestive regularity and bowel function

Enhances bowel movement frequency and reduces constipation

Stimulates intestinal motility and improves stool consistency Evidence A-grade 1-4 weeks of consistent supplementation

Enhanced lactose digestion and tolerance

Improves ability to digest dairy products and reduces lactose intolerance

Produces β-galactosidase enzyme to break down lactose Evidence A-grade 1-3 weeks of regular use

Strengthened immune system function

Enhances immune response and reduces respiratory infection risk

Stimulates immune cell activity and antibody production Evidence A-grade 4-12 weeks of consistent use

Reduced IBS symptoms and digestive discomfort

May alleviate irritable bowel syndrome symptoms and bloating

Modulates gut-brain axis and reduces intestinal inflammation Evidence B-grade 4-8 weeks of regular supplementation

Enhanced nutrient absorption

Improves absorption of vitamins, minerals, and other nutrients

Optimizes gut barrier function and digestive enzyme activity Evidence B-grade 2-6 weeks of consistent use

Others take these for the same thing

Same goal, different mechanism — check any of them against this one

Probiotics for Autoimmune Disease Support Gut health & immune modulation 10-100 billion CFU daily B 60% Magnesium Glycinate Superior absorption sleep & muscle support 200-600 mg A 90% Magnesium Citrate Balanced absorption & digestive support 300-600 mg A 35% Chloride Electrolyte & digestive support 2300mg A 95% Bone Broth Collagen Gut healing & collagen support 20-40g powder B 85% Psyllium Husk Digestive health & cholesterol support 5-15g A 95%

Every pair we checked

12 combinations scored by the engine

Bifidobacterium lactis + Caffeine No documented interaction either way No known interaction 70

Bifidobacterium lactis + Creatine Monohydrate No documented interaction either way No known interaction 70

Bifidobacterium lactis + Vitamin D3 No documented interaction either way No known interaction 70

Bifidobacterium lactis + Calcium Carbonate No documented interaction either way No known interaction 70

Bifidobacterium lactis + Whey Protein No documented interaction either way No known interaction 70

Bifidobacterium lactis + Bovine Collagen No documented interaction either way No known interaction 70

Bifidobacterium lactis + DHA No documented interaction either way No known interaction 70

Bifidobacterium lactis + Turmeric No documented interaction either way No known interaction 70

Bifidobacterium lactis + Fish Oil (EPA/DHA) No documented interaction either way No known interaction 70

Bifidobacterium lactis + Magnesium Oxide No documented interaction either way No known interaction 70

Bifidobacterium lactis + Lactase Enhanced lactose digestion when combined Works better together 78

Bifidobacterium lactis + Inulin Improved probiotic survival and colonization Works better together 82

Dosage

With meals especially dairy

Daily1-20 billion CFU

Digestive regularity1-10 billion CFU daily with meals

Lactose tolerance1-5 billion CFU with dairy products

Immune support5-20 billion CFU daily

Ibs management10-20 billion CFU daily divided doses

When to expect it

First Effects3-7 days for digestive regularity improvements

Peak Benefits2-8 weeks for maximum digestive and immune benefits

Deficiency DevelopmentBeneficial bacteria depleted by antibiotics, stress, poor diet

Toxicity OnsetNo known toxicity - extremely safe probiotic

How to measure it

$200-400

MarkerStool microbiome analysis, digestive function markers, immune markers

OptimalAdequate Bifidobacterium levels and balanced gut microbiome

Deficient belowLow Bifidobacterium counts in microbiome analysis

FrequencyMonitor microbiome if using for digestive health optimization

What people actually reported to the FDA

CAERS, 1 reports naming it as the suspect

Most reported effects

Gastritis 1

Named as the suspect 1 reports of 7 that mention it at all

Serious outcome 50% hospitalisation, emergency room or worse

Hospitalization1

Visited a Health Care Provider1

Reports are voluntary and unverified — they record what someone experienced while taking something, not what the compound caused. Counts skew towards products people take a lot of, and a serious outcome is more likely to be reported than a mild one, so these are not rates. How we filter them →

Works better with

3 documented

Lactase Enzyme

Enhanced lactose digestion when combined

Complementary enzymes for improved dairy tolerance · level B

Prebiotic Fos Inulin

Improved probiotic survival and colonization

Prebiotics provide nutrients for beneficial bacteria growth · level A

Other Bifidobacterium Strains

Synergistic benefits with multi-strain formulations

Different strains provide complementary digestive benefits · level A

What not to take with Bifidobacterium lactis

3 documented

Broad Spectrum Antibiotics

Antibiotics eliminate beneficial bacteria including B. lactis

Antimicrobial action disrupts gut microbiome · high significance

Proton Pump Inhibitors

PPIs may reduce probiotic survival in stomach

Altered stomach pH affects bacterial viability · moderate significance

Excessive Processed Foods

Highly processed diet may impair probiotic effectiveness

Poor diet promotes harmful bacteria growth · moderate significance

Medication interactions

Discuss these with a pharmacist before combining

antibiotics Moderate

Antibiotics significantly reduce probiotic viability

What to do: Take probiotics 2-3 hours after antibiotic doses

immunosuppressive-drugs Minor

Slight infection risk in severely immunosuppressed patients

What to do: Use caution in severe immunosuppression

Available forms

bioavailability compared

Bifidobacterium lactis HN019 (Clinical strain) 85

Bifidobacterium lactis HN019 (Clinical strain): Extensive research, Proven digestive benefits, Good survival rates, Lactose digestion

Food sources

before you supplement

Fermented dairy products (yogurt, kefir) 10^6-10^8 CFU per serving · 70

Probiotic yogurt with live cultures 10^7-10^9 CFU per serving · 75

Aged cheeses Variable, typically 10^4-10^6 CFU · 60

B. lactis probiotic supplements 1-50 billion CFU per serving · 85

Too little

deficiency signs

Gut microbiome imbalance symptoms:
Chronic constipation and irregular bowel movements
Lactose intolerance and dairy-related digestive issues
Frequent infections and compromised immunity
IBS symptoms including bloating and abdominal discomfort
Poor nutrient absorption and digestive inefficiency
Increased intestinal permeability and inflammation

Too much

toxicity signs

Extremely safe with minimal adverse effects:
Temporary digestive adjustment during initial supplementation
Rare bacterial overgrowth in severely immunocompromised
No documented serious adverse effects in healthy populations
Safe for daily long-term use

Who benefits most

constipation-digestive-issues

Significantly improves bowel regularity and digestive comfort

1-20 billion CFU daily

lactose-intolerant-individuals

Enhances lactose digestion and reduces dairy-related symptoms

1-10 billion CFU daily with dairy products

immune-support-seekers

Strengthens immune function and reduces infection risk

5-20 billion CFU daily

ibs-digestive-disorder-sufferers

May help reduce IBS symptoms and digestive discomfort

10-20 billion CFU daily long-term

general-digestive-health

Supports overall gut health and nutrient absorption

1-10 billion CFU daily with meals

Where to buy it

compare forms first

Look for Bifidobacterium lactis at 1-20 billion CFU per serving. The form that matters here is Bifidobacterium lactis HN019 (Clinical strain).

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What else affects it

Beyond other supplements

Excessive processed foods

Highly processed diet may impair probiotic effectiveness

Poor diet promotes harmful bacteria growth

How it works

Produces β-galactosidase enzyme for lactose breakdown
Enhances intestinal motility and improves bowel movements
Strengthens gut barrier function and tight junction integrity
Stimulates immune cell proliferation and antibody production
Competes with pathogenic bacteria for adhesion sites
Produces short-chain fatty acids for gut health

Key findings

what the evidence supports

Consistently effective for improving digestive regularity and bowel function
Proven benefits for lactose digestion and dairy tolerance
Strong evidence for immune system enhancement
Excellent safety profile for long-term daily use

Sources: NIH Examine.com · data reviewed 2026-08-02

Compiled by Denis, who maintains this database and holds no medical qualification — every figure here is sourced or derived, never asserted. How we calculate it →

Common questions

What are the benefits of Bifidobacterium lactis?

Documented effects: Improved digestive regularity and bowel function; Enhanced lactose digestion and tolerance; Strengthened immune system function; Reduced IBS symptoms and digestive discomfort. Enhances bowel movement frequency and reduces constipation

How much Bifidobacterium lactis should you take per day?

The common daily range is 1-20 billion CFU. By goal — digestive regularity: 1-10 billion CFU daily with meals; lactose tolerance: 1-5 billion CFU with dairy products; immune support: 5-20 billion CFU daily; ibs management: 10-20 billion CFU daily divided doses.

When is the best time to take Bifidobacterium lactis?

With meals especially dairy. First effects are typically reported within 3-7 days for digestive regularity improvements.

What are the side effects of Bifidobacterium lactis?

At excessive doses: Extremely safe with minimal adverse effects:, Temporary digestive adjustment during initial supplementation, Rare bacterial overgrowth in severely immunocompromised, No documented serious adverse effects in healthy populations, Safe for daily long-term use. Safety rating at normal doses is 10 out of 10.

What should you not take with Bifidobacterium lactis?

Separate it from Broad Spectrum Antibiotics, Proton Pump Inhibitors, Excessive Processed Foods by two to four hours. Antibiotics eliminate beneficial bacteria including B. lactis

Does Bifidobacterium lactis interact with medications?

Documented interactions with antibiotics, immunosuppressive-drugs. Discuss these with a pharmacist before combining.

How do you know if you need Bifidobacterium lactis?

The marker is Stool microbiome analysis, digestive function markers, immune markers, optimal range Adequate Bifidobacterium levels and balanced gut microbiome. Common deficiency signs: Gut microbiome imbalance symptoms:, Chronic constipation and irregular bowel movements, Lactose intolerance and dairy-related digestive issues, Frequent infections and compromised immunity.

Taken for

74 Digestion

Lactase · Lactobacillus acidophilus · Protease