They should compare meat from cans, from plastic bags and fresh meat....get a live chicken and stab it a few times with a sample core auger. Right? How could we beat torture the animals before we eat them? Grinding them up using plastic bushings makes plastic particles, grinding them using stones makes stone particles. Finally grinding them using carbides and metals leaves carbide and metal particles!
We chew... maybe our methods of animal torture should include calcium carbonate tools, smashers, mushers, cutters, grinders, etc? All particles would then be made of stuff that is good for us.