Figure 6

![Figure 6: Breath hydrogen levels measured during lactulose breath testing decrease after probiotic treatment, suggesting reduction in small intestinal bacterial overgrowth. Peak hydrogen values are significantly lower in the treatment group.]()

> Source: Konstantinos Leventogiannis et al. "Effect of a Preparation of Four Probiotics on Symptoms of Patients with Irritabl." *Probiotics and antimicrobial proteins*, 2019. PMID: [29508268](https://pubmed.ncbi.nlm.nih.gov/29508268/)

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  <img src="" alt="Breath hydrogen levels measured during lactulose breath testing decrease after probiotic treatment, suggesting reduction in small intestinal bacterial overgrowth. Peak hydrogen values are significantly lower in the treatment group." />
  <figcaption>Figure 6. Breath hydrogen levels measured during lactulose breath testing decrease after probiotic treatment, suggesting reduction in small intestinal bacterial overgrowth. Peak hydrogen values are significantly lower in the treatment group.<br>  Source: Konstantinos Leventogiannis et al. "Effect of a Preparation of Four Probiotics on Symptoms of Patients with Irritabl." <em>Probiotics and antimicrobial proteins</em>, 2019. PMID: <a href="https://pubmed.ncbi.nlm.nih.gov/29508268/">29508268</a></figcaption>
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