I must say it sure is interesting how our bodies work . I have noticed personally that the effects of having a poor diet seem to effect my mentality and not so much my physical being. Over the past three years or so I've experienced the worst mental and emotional hardships of my life so far and yes I've become what most would call an unhealthy eater, I do not exercise, I smoke a pack every two days. I have not been to the doctors in three years because I feel physically fine. I have not had the flu or anything worse then a slight itchy eye allergy. I am curious as to what it is that our bodies hold that seem to filter out or block selected germs or whatever may be trying to cause harm?