Colief Multibiotic Drops contain two scientifically proven friendly bacteria strains: Lactobacillus rhamnosus, LGG (the world's most documented bacteria strain) and Bifidobacterium infantis. These probiotics complement the gut flora naturally present in your baby's digestive system. Suitable for breastfed and formula-fed infants from birth onwards, these drops are designed for newborns, infants, and young children and can be used long-term. The liquid drops are easy to administer directly to your baby, or can be added to breast milk, infant formula, milk, or yogurt. They can also be administered by adding onto the nipple prior to breastfeeding. Probiotics are generally regarded as safe and well-tolerated.