There are about 6 million bacteria on every square inch of your skin.
There are more bacteria in your GI tract than there are cells in your body, about 3-4 lbs worth in an average adult.
They are responsible for digestion and absorption, immune function, and production of hormones and vitamins.
When you take an antibiotic you kill lots of these good guys along with the bad guys. This gives the bad guys a place to fill in the gap and spread. This sets you up for another round of antibiotics and the vicious cycle begins. Your immune system will be compromised. 80% of it is in your GI tract! You will experience gas and bloating, diarrhea and constipation, skin problems like eczema and psoriasis, ear and sinus infections, and possibly even cancer down the road. For all of these symptoms your doctor will prescribe more drugs which will further muck up your system.
Would you like to know how to avoid this situation? Drink filtered water with no chlorine. Get 7 hours sleep every night in a dark room. Now that you're well hydrated and rested go exercise! Eat to promote healthy bacteria and good digestion and absorption. Lots of fruits and veggies in a side variety of colors. Sometimes raw, sometimes lightly steamed. Check out cultured vegetables for great gut flora! Stay away from the whites; flour, sugar. Various animal proteins in moderation, meaning no Texas sized steaks.