Yes it is, but there is no reason in the world to put toxins in your body, and its not balance, no toxin is good for you. I don't know where this nonsense comes from.
If you was to storm the beaches at Normandy you would know that you might get shot, they are telling you and you are believing them without even checking that its safe and its good for you. It isn't and if you knew anything about what you are putting in your body you wouldn't do it. OK , so they've tricked you into trusting them, and now you all want to defend your decisions that you've took because they told you too.
Even the basics, without much thinking involved should tell you its madness !
Balance and risk. You are taking the risk and there is NO reward, no matter what rubbish and lies they spout, to get you to comply.