If a person carefully read the label of ingredients on most of our processed foods, and then looked up those ingredients on the Internet, they would probably think about becoming a "Organic Vegetarian". Farm products are full of pesticide and fertilizer residues, Meat is full of steroids and growth hormones, fish/seafood is loaded with pollutants, and the factories lace their products with any number of "enhancements" so as to increase their profits. The jury is still out on the long term effects of some of these Genetic Modified seeds that most farmers are now using. About the Only time I feel I am eating something really safe is when we pick our fresh vegetables out of our garden.
The one that really cracks me up is "artificial sweeteners", such as used in sugar substitutes and Diet Soda. Most of that junk contains Aspartame....I buy some every year and scatter it around our decks...it is the Best Ant Poison I have ever found.