For chronic diarrhea, particularly in the context of needing a probiotic, certain strains have shown promise based on existing research. Lactobacillus rhamnosus GG (LGG) and Saccharomyces boulardii are two of the most studied probiotics for their effectiveness in reducing the duration and frequency of diarrhea¹².

1. Lactobacillus rhamnosus GG (LGG): This strain has been shown to be effective in reducing the duration of infectious diarrhea. It was found to be most effective at daily doses of at least (10^{10}) CFU¹.

2. Saccharomyces boulardii: Studies have demonstrated that this probiotic can also be effective at reducing both the duration of diarrhea and stool frequency. The typical effective dose ranges from (10^9) to (10^{10}) CFU per day, taken for about 5 to 10 days².

For those in the UK seeking relief from chronic diarrhea, these probiotic strains could potentially be part of the solution. Before starting any new supplement regimen, it's advisable to consult with a healthcare professional to ensure it's appropriate for your specific condition and health status.

If you would like, I can help you find specific products containing these probiotics. Would you like me to search for them?

Footnotes

1. Office of Dietary Supplements - Probiotics. ↩ ↩²

2. Probiotics for Prevention and Treatment of Diarrhea - PubMed ↩ ↩²