Did you know that the human body is made up of 10 trillion cells? If you think that's mind-boggling, now consider this: there are ten times that many bacteria living inside of your intestines. Some experts have labeled this universe in your gut as the "forgotten organ", because these little guys do all kinds of stuff for our bodies. In fact, the activity of bacteria in your colon makes the colon the most metabollically active organ in your body!
Some of the activity of these bugs can be annoying - for example, they help to digest some of the food that we can't digest - this makes more of the calories we eat available to us, but also can cause bloating and gas from the gas they release after eating. But, they do so much more for us, and science is really just now figuring out the whats and hows; it's very complicated, because it kind of depends on "who" is the dominant strain in your gut (they estimate that you have between 300 to 1000 different strains in there). Bacteria eat, they fight, they release all kinds of by-products; everything they do has an effect on the host (us!).
The science is still new, but having a gut-full of "good" bacteria seems to be helpful at keeping our immune system running properly, and may even be linked to whether or not we become obese!
So, how to develop and nurture a bellyful of the good guys? It is likely related to our overall and longterm diet - and it is likely most beneficial to eat a plant-based diet over the long term. Yes, it comes back to the fruits, vegetables, beans, and whole grains. It also seems to be helful to eat what is termed "fermented foods" - yogurt, buttermilk, kefir, and sauerkraut for example.
By the way, one of the theories to explain why exclusively breastfed babies tend to end up as lean adults is that they are allowed to "grow" the right mix of gut bacteria and establish a nice strong colony of the good guys. Fascinating, right? Now, go have your beans today!
