Yes, that's right; if you believe that you truly have developed a remarkable healing elixir in your garage, the burden is on you to obtain scientifically valid proof that it does what you claim it will do before you can go around selling it to people.
Whether or not you see this as a horribly unjust burden imposed by an unfeeling government will probably depend on whether you are the inventor or the person the inventor was planning on selling it to.