Optibac Probiotics Babies & Children is an ideal alternative to BioKult Infantis. Like BioKult Infantis, Optibac Probiotics Babies & Children probiotic sachets contain added Fructooligosaccharide (FOS) fibres to maintain natural gut bacteria, and Vitamin D to support immune health. But unlike BioKult Infantis, Optibac Probiotics Babies & Children is dairy-free, vegetarian, and contains the world's most researched live cultures strain1, Lactobacillus rhamnosus GG, extensively studied in infants and children.