Except proven has a strict definition here that leaves out other possibilities. You could find some compound that reliably induces an effect in your own body,

Except proven has a strict definition here that leaves out other possibilities. You could find some compound that reliably induces an effect in your own body, but has never been studied by anyone else. By the definition we're using here, that could be something thats working wonderfully but has no "proven" medical effects. Not saying this is advisable, only that pharma companies and their trials don't dictate reality.