Human milk oligosaccharides (HMOs), the 3rd most abundant component in breast milk, are known for modulating the immune system and exhibiting prebiotic activity. Of the three major types of HMOs, 2'fucosyllactose (2’FL) and lacto-N-neotetraose (LNnT) are the most abundant.

The metabolites produced by them strengthen the gut barrier and have antiviral as well as antimicrobial activity. Clinical evidence has established major health benefits of the 2’FL and LNnT combination for infants.