Lacticaseibacillus rhamnosus GG (LGG, strain ATCC 53103) is a probiotic strain first isolated from the human gut in the 1980s and studied in people for more than 30 years. It is known for surviving stomach acid and bile on its way through the digestive tract.

QI L. rhamnosus delivers 10 billion CFU of LGG in one daily capsule, paired with inulin (chicory root fiber).