Home Ingredients Morinaga BB536 (Bifidobacterium longum BB536)
Gut HealthImmune Support

Morinaga BB536 (Bifidobacterium longum BB536)

Evidence Level
Strong
1 Clinical Trial
3 Documented Benefits
4/5 Evidence Score

Morinaga BB536 is a well-studied probiotic strain of Bifidobacterium longum from Morinaga Milk Industry, used for decades in foods and supplements. It is studied for supporting gut balance, regularity, and immune function, and has one of the longer safety and research records among branded probiotic strains.

Studied Dose Often 1 to 5 billion CFU or more per day.
Active Compound Bifidobacterium longum BB536, a live probiotic strain delivered at defined CFU counts.

Benefits

Gut balance and regularity

BB536 supports a healthy balance of gut bacteria and is studied for improving regularity and easing constipation.

Supported by Trial 1

Immune support

The strain is researched for supporting immune defenses, including respiratory and seasonal immune challenges.

Microbiome resilience

BB536 helps maintain beneficial bifidobacteria, supporting a stable, resilient microbiome.

Supported by Trial 1

Mechanism of action

1

Bifidobacterial colonization

BB536 transiently colonizes the gut, competing with less desirable microbes and producing beneficial metabolites such as short-chain fatty acids.

2

Immune modulation

Interactions with gut-associated immune tissue help tune immune responses toward balance.

Clinical trials

1
Bifidobacterium longum BB536 — Human Study
PubMed

Study of Bifidobacterium longum BB536 on gut and related health outcomes. (Miyamoto et al. 2026, Journal of the International Society of Sports Nutrition)

Adults.

BB536 supplementation was associated with improvements in gut-related measures, consistent with the strain's established benefits.

Side effects and drug interactions

Common Potential side effects

GENERALLY WELL-TOLERATED — BB536 has a long safety record.
Mild, temporary gas or bloating can occur at first.
Immunocompromised individuals should consult a doctor before live probiotics.

Important Drug interactions

Antibiotics — separate dosing by a few hours.
Immunosuppressants — use live probiotics cautiously if immunocompromised.
Tell your doctor if you have a serious illness or a central line.

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Frequently asked questions about Morinaga BB536 (Bifidobacterium longum BB536)

What is Morinaga BB536 (Bifidobacterium longum BB536)?

Morinaga BB536 is a well-studied probiotic strain of Bifidobacterium longum from Morinaga Milk Industry, used for decades in foods and supplements. It is studied for supporting gut balance, regularity, and immune function, and has one of the longer safety and research records among branded probiotic strains.

What is the recommended dosage of Morinaga BB536 (Bifidobacterium longum BB536)?

The clinically studied dose for Morinaga BB536 (Bifidobacterium longum BB536) is Often 1 to 5 billion CFU or more per day.. Always follow product labeling and consult a healthcare provider for personalized dosing recommendations.

What is Morinaga BB536 (Bifidobacterium longum BB536) used for?

Morinaga BB536 (Bifidobacterium longum BB536) is studied for gut balance and regularity, immune support, microbiome resilience. BB536 supports a healthy balance of gut bacteria and is studied for improving regularity and easing constipation.

Are there side effects from taking Morinaga BB536 (Bifidobacterium longum BB536)?

Reported potential side effects may include: GENERALLY WELL-TOLERATED — BB536 has a long safety record. Mild, temporary gas or bloating can occur at first. Always consult a healthcare provider before starting any new supplement, especially if you have underlying conditions or take medications.

Is Morinaga BB536 (Bifidobacterium longum BB536) safe to take?

Whether Morinaga BB536 (Bifidobacterium longum BB536) is safe depends on the dose, your overall health, and any medications you take. At studied doses, reported side effects can include: GENERALLY WELL-TOLERATED — BB536 has a long safety record. It may also interact with certain medications. Morinaga BB536 (Bifidobacterium longum BB536) is not suitable for everyone — consult a healthcare provider before use if you are pregnant or breastfeeding, have a medical condition, or take prescription medications.

References(1 citations)

Evidence ratings on NutraSmarts are based on the totality of human clinical research, with emphasis on randomized controlled trials, meta-analyses, and systematic reviews. The references below directly support claims made throughout this page.

  1. Miyamoto S, Yoshimoto S, Katsumata N, et al. Bifidobacterium longum BB536 is associated with improvements in gut health. J Int Soc Sports Nutr. 2026;23(1):2664664..PubMedUsed to support: Human study supporting gut-health benefit of BB536.