M-63:
Bifidobacterium longum subspecies infantis M-63 is unique among gut bacteria in its immense capacity to utilize human milk oligosaccharide (HMOs), the component that is highly abundant in human breast milk. HMOs offer no direct nutritive value for infants, but they function in shaping a better infant gut microbiota with life-long impacts. M-63 possesses superior potential to colonize and adapt to the intestinal environment of humans, especially infants.