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Saccharomyces boulardii was discovered in Vietnam 100 years ago… and it comes from lychees

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Can the Evidence-Based Use of Probiotics (Notably Saccharomyces boulardii CNCM I-745 and Lactobacillus rhamnosus GG) Mitigate the Clinical Effects of Antibiotic-Associated Dysbiosis?

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Saccharomyces boulardii, a yeast probiotic, inhibits gut motility through upregulating intestinal serotonin transporter and modulating gut microbiota - ScienceDirect

Lake Avenue Nutrition Saccharomyces Boulardii Probiotic Yeast, 10 Billion CFU Supports Intestinal Flora* Suitable for Vegetarians and Vegans

Lake Avenue Nutrition Saccharomyces Boulardii, 10 Billion CFU, 180 Veggie Capsules