Here's a little guest post from Tim "Tatertot" Steele.
When you start looking at RS and gut bugs, here's a connection I recently came across that I will be exploring further for merit.
In human breast milk, there are hundreds of compounds called Humans Milk Oligosaccharides (HMOS). There are also hundreds of bacterial strains present in breast milk, presumably through the entero-mammary pathway. This combination of pre and probiotics results in rapid structure of the newborn's gut to favor almost exclusively probiotic strains of bifidobacteria and lactic acid bacterias.