Lactobacillus reuteri is one of the most well researched probiotics, and especially so in the very young. To date 55 clinical studies using BioGaia Probiotics' human strains of Lactobacillus reuteri have been performed in more than 4,100 individuals of all ages. Results have been published in 28 articles in scientific journals (January 2009). The following fields have been investigated in studies in humans:

• Gut health
• Immune health
• Allergy
• Oral health
• Safety