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Probiotics are one of the fastest growing supplement categories in the United States, widely touted for their beneficial gastrointestinal properties.* They are found in yogurt, kefir, kombucha, sauerkraut, kimchi, and other foods. Given their recent popularity, more and more foods and drinks are now being fortified with beneficial bacteria. The most popular families of probiotics are Lactobacillus and Bifidobacterium. There are thousands of different strains of probiotics; our probiotic stick includes two highly studied strains: Bifidobacterium lactis Bl-04, and Lactobacillus rhamnosus GG.
A randomized, double-blind, placebo-controlled study found consumers taking *Bifidobacterium lactis* Bl-04 had experienced lower risk of upper respiratory infection than a placebo group. Another probiotic blend in the study did not show results comparable to *Bifidobacterium lactis* Bl-04.
- Probiotic supplementation for respiratory and gastrointestinal illness symptoms in healthy physically active individuals.Clinical nutrition,2014
A separate randomized, double-blind, placebo-controlled trial found taking Lactobacillus rhamnosus GG significantly reduced risk for gastrointestinal infections; respiratory tract infections; vomiting episodes; diarrheal episodes; episodes of gastrointestinal infections that lasted >2 days; episodes of respiratory tract infections that lasted >3 days.
- Lactobacillus GG in the prevention of nosocomial gastrointestinal and respiratory tract infectionsPediatrics,2010