Culturelle Ultimate Balance Probiotic for Antibiotics Culturelle Ultimate Balance Probiotic for Antibiotics is exclusively powered by Lactobacillus rhamnosus GG (LGG). LGG harmonizes your microbiome in 3 ways: by adding good bacteria into your body, influencing existing bacteria within your body and helping to keep non-beneficial bacteria from thriving.* LGG, the single-strain super probiotic, is the only probiotic strain you need to help support good digestion and immune health even while taking antibiotics.*Culturelle Ultimate Balance Probiotic for Antibiotics rebuilds the bacterial balance lost to antibiotic use.* It supports the healthy response of your body’ s natural defenses and contributes to a healthy immune system.* Taking Culturelle Ultimate Balance for Antibiotics during and after antibiotic use is a great way to help bring your digestive system back in balance to keep you healthy and strong.