Biogaia probiotic is a supplement primarily for digestive health, particularly for infants, containing lactobacillus reuteri, which aids in balancing intestinal flora and alleviating conditions such as colic, diarrhea, constipation, and regurgitation. It is available in various forms like drops, tablets, and lozenges, and is recognized for its safety and efficacy. The probiotic also shows potential benefits for oral health, addressing issues like halitosis and gum disease.