: If you give a diabetic insulin, he lives. You don't, he dies. You give a schizophrenic anti-psychotics, he's sane; you don't, he stays insane. Diabetics don't care whether you think the drug commericials are evasive or deceptive; they know they will die without the drug. Nothing can be done to stop the ravages of scurvy without a diet change. All of this has been tested scientifically, and these are just the cases with immediate, obvious effects.