Another chemical to consider is Aspartame. It's routinely used as a dietary supplement in most sugar free sodas. It's banned in some countries because of its harmful health effects, cancer being one. Of course, Monsanto disclaims this.
I believe the growing number of health problems we are seeing are a result of chemicals being used with little regard for human life.

When my steak is on the grill I feel my mouth watering. I wonder if vegans feel the same way when mowing the lawn?