I'm not paranoid about big brother.
But then I don't fill my body full of chemicals, so my mental health is normal thankfully.
You fill your body full of chemicals every single day. In fact they are an essential component to life and if you didn't, you'd be dead. Your body is nothing but an organic collection of chemicals, chemical, biological and electrical reactions.
But this has nothing to do with paranoia, although I would say your brain health isn't very normal if you consider my argument which is pretty much common knowledge as "paranoia". And if your brain isn't filled with chemicals then I wonder what it is filled with. But I certainly hope, and it does appear, that at least your brain is indeed filled with the necessary chemicals for it to at least perform some of its functions if you are capable of writing that post.
Now this is just an opinion, since I'm not qualified, but I believe you suffer from something much worse than the intake of chemicals, and that's the intake of massive ignorance.
The problem is as a society we're just simply uneducated and too ignorant and lazy to deal with them, so we prefer having someone who is generally not qualified-the government (commonly it's actually the lobbyists of the financial departments of pharmaceutical companies(at least the research departments would pass better laws)- to teach us about them through generic labels followed by laws. Laws usually passed ignorantly, most of the times based on fear, far before they are truly understood, other times for special interests, all wrapped up and sold as a package of good intentions.
The truth is you can kill yourself and destroy your body just as easily with sugar and salt over time as you can with HGH(a protein with endocrine functions) and cocaine(a more complex, but basically another nitrogen compound... nitrogen being one of the most common elements you tend to breathe into your lungs every couple of seconds). The difference is we are not nearly as ignorant and have become pretty comfortable with using sugar and salt compared to the others as long as we follow some general rules.
Of course a lot of us still don't. Which is why so many people end up with diabetes and other heart diseases, and I assume in your case you would be a huge proponent of rounding up all the diabetes patients and sending them to jail rather than hospitals for the choices they made in their lives...like binging on sugar!
All arrogance and jokes aside, in the end it doesn't really matter how much better you think your brain is by not using. For the record though, I personally don't like and don't use drugs either. But that's mainly due to to fear and ignorance. If I knew more about them, maybe I would. But I do support them and support the liberty of those who do and a lot of times applaud those who take the risks to learn how to use them, because eventually it will be passed down into the general public and we'll be able to learn more about them as well. Just as we learned how to use sugar and salt.
But NOT as long as we have laws against them that put these people in jail or suspend them from sports. IMO, all that does is impedes a natural progress and evolution that would otherwise teach us a lot more about them. Personally I'm glad a few countries had the enlightenment to go ahead and decriminalize all drugs and hope that the USA one day follows that lead. Of course we are talking about complete "savages" like the Portuguese, Italians and Spaniards...so we can't possibly follow their example....