Biogaia Probiotic Oral Drop 5 ml Good microorganisms help maintain a natural balance in the gut. Each 5 drops contain 100 million Lactobacillus reuteri Protectis, safe for long-term use and one of the safest probiotics that have been clinically studied in children and recommended by pediatricians worldwide. Do not add to hot drinks or food as this may cause damage to live bacteria, which is recommended frequently to maintain gut health