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Probiotics (Bifidobacterium) Research & Evidence

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Evidence Level

Strong

Bifidobacterium is one of the two most important probiotic genera alongside Lactobacillus. B. infantis 35624 has the strongest single-strain evidence for IBS from a large dose-finding RCT (Whorwell et al., 2006). B. lactis BB-12 is the most documented probiotic strain in the world with over 400 publications. Bifidobacterium abundance naturally declines with aging, which correlates with increased gut inflammation and immune dysfunction — supplementation may help restore youthful microbiome patterns.

Evidence by Condition

ConditionStudied DoseEvidence
IBS (all subtypes)1 billion CFU B. infantis 35624 dailyStrong
Immune support1-10 billion CFU B. lactis BB-12 dailyStrong
Constipation/regularity1-10 billion CFU B. lactis HN019 dailyModerate
Full Probiotics (Bifidobacterium) Guide

References

  1. (). Efficacy of an encapsulated probiotic Bifidobacterium infantis 35624 in women with irritable bowel syndrome. American Journal of Gastroenterology. DOI
  2. (). Evaluation of the immune benefits of two probiotic strains Bifidobacterium animalis ssp. lactis BB-12 and Lactobacillus paracasei ssp. paracasei L. casei 431 in an influenza vaccination model. British Journal of Nutrition. DOI