IMO... probiotics are especially important because your immune system essentially lives in your gut, and so does the base of our health because without food absorption we're dead. And our clorinated, over-treated, anti-bacterial world is continuously trying to kill off all bacteria - good and bad. It is important to replace the good guys in there to keep the balance.
yes, yes - also, most of us have had more than our fair share of bacterial infections which doctors prescribed "kill everything" antibiotics, and unfortunately, in killing the bad bacteria, it also kills the good bacteria which is necessary for digestion. i know i was a safe bet to have pneumonia every year, and usually some other ailment. for, like, 30 years....... untreated celiacs are a good target for evil germs because our immune system is already compromised. like shooting fish in a barrel.
i just went through my second winter without having to go to the doctor with pneumonia or something that my body couldn't fight off on it's own. every cold or virus i ever caught progressed into bronchitis or pneumonia that required me to be treated with antibiotics. not since my gut started healing: i now have Super Guts!!!!!!!!! lolz