caikgoch
Esteemed Citizen of ZV
Got news for you, there are lots of completely natural poisons in plants. Ask anyone that cuts hay. If you do it wrong, you can kill a herd.I'd have to say it's where you food is sourced from. We all know about polluted waters, etc. But if your vegetables are sprayed with pesticides (like with the Monsanto problem) is it really any better? Neither pesticide-laden vegetables or mercury fish sound like a very good idea.
The point is that over a lifetime a herbivore will accumulate traces of poisons from thousands of plants. A carnivore will accumulate the poisons and pathogens from hundreds of herbivores. The closer the carnivore is to you in environment and species, the more things that are bad for you are in their meat. That's basic biology.