Also known as: beneficial bacteria, lactobacillus, bifidobacterium
Latest evidence update: 2026-12-01
Strongest in Sample size (95). Held back by Recency (65).
Solid mix of RCTs with some methodological gaps.
Confirmed across many independent studies with significant findings.
Tens of thousands of participants pooled across studies.
Studies agree on direction of effect.
Healthy mix of recent and established research.
Recommended: 10-50 billion CFU daily
ProtocolEngine provides general health information based on published research. This is not medical advice. Consult a healthcare professional before starting any supplement or health protocol.
May help reduce severity and incidence of mouth sores in head and neck cancer patients undergoing chemotherapy and radiation
May improve ability to complete radiation therapy treatment in head and neck cancer patients
May improve fertility outcomes in women with polycystic ovary syndrome undergoing fertility treatment
May reduce digestive side effects caused by metformin medication in women with insulin resistance
May help restore healthy gut bacteria balance and reduce inflammation in older adults receiving tube feeding