I used to pretty much eat everything, was particularly fond of Pork Vindaloo and everything pork. Also had to have my Hamburger, usually at Hard Rock Cafe, at least once a month. Years at boarding school and more than a decade at sea taught me to eat, and relish, pretty much everything.
I noticed that there was a correlation between my digestive health and the amount of meat I ate...the more "Non-veg" I ate, the heavier I felt after my meals, and I didn't sleep as soundly. This took some experimentation- days when I was off the Carne.
Also, a year or so ago, I started practicing Yoga-the kind that is more breathing and concentration than physical contortions. I'd read that eating meat affects concentration, so I decided to find out if it was true.
After a year, I have to say that yes, there are definite differences in me- physiologically and mentally, for lack of a better word- between the times I eat meat and don't. The morning after I've had a juicy 4oz. with fries at HRC, for example, my concentration wavers more. Sleep is more disturbed, I dream more vivid dreams. I generally have a better day on the days I stay veg.
Not that I've turned Vegetarian overnight- I still give in to meat pretty regularly, but now that I have seen the difference that it makes, I aim to switch to a vegetarian diet (yes to Fish and eggs, please) gradually.
I've read- Whenever an animal is slaughtered, the cocktail of hormones released into the bloodstream is absorbed by the tissues which we in turn absorb when we consume them. Then there's all the stuff they feed them and inject them with-Not that veggies are free and natural by a long shot, but it's the lesser of two evils.