meta-analysis of probiotic studies = mostly meh, here is the nuance

read through ~20 RCTs on probiotics this weekend. honest take: most pooled analyses are weak because they mix strains. the signal when you look strain by strain is much more interesting. B. infantis 35624 for IBS-D has legit data. S. boulardii for AAD has legit data. the 'take any probiotic' advice is the problem, not probiotics themselves. will DM sources if anyone wants.