Fiber isn’t the only prebiotic. For example, about 30 percent of the caloric content of human breast milk is made of “indigestible” oligosaccharides.7535 Though we may not be able to digest them, guess who can? Bifidobacterium infantis, good bacteria in the guts of infants. That’s how important the human-bacteria relationship is. We were designed to be a symbiotic species.
