Supplement analysis backed by scientific evidence · PT

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Moderate evidenceGut health

Lactobacillus Bulgaricus

The classic yogurt bacterium, normally paired with Streptococcus thermophilus. Its lactase genuinely helps people digest lactose in the food it ferments; as a standalone capsule it is far less studied.

Evidence last reviewed: August 2026

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What the science says

  • Helps lactose digestion in dairy Moderate evidence

    A controlled human study in lactose maldigesters found milk carrying 10^8 cfu/mL of S. thermophilus and L. bulgaricus lowered peak breath hydrogen from about 70 to 20 ppm and eliminated intolerance symptoms, an effect traced to the bacteria's beta-galactosidase.

  • Probiotics for lactose intolerance in general Moderate evidence

    A meta-analysis of 12 studies found probiotic administration reduced abdominal pain, diarrhoea and flatulence in adults with lactose intolerance, with effect size related to dose. Publication bias was detected, though the effect persisted after correction.

  • Weak case for the capsule form Limited evidence

    L. bulgaricus is not bile-resistant and is not a resident of the human colon, so it acts mainly in transit. Little trial evidence supports capsules of the strain taken apart from dairy.

Dosage & safety

Studied doseLive-culture yogurt supplies the studied exposure. Capsules typically provide 1–10 billion CFU per day; no capsule dose has been validated against a specific outcome.
SafetyVery safe for healthy people, with occasional gas in the first days. As with any live probiotic, caution in severe immunosuppression, indwelling central lines or critical illness. Dairy-derived products may carry traces of milk protein.

Scientific references

Where to buy

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