Laetril failed as have many drugs. So what. This has not stopped people from searching. Banned substances are banned for being dangerous.

Why is some brave for recommending a treatment? Is this because they are recommending a bad treatment, or an unproven treatment, or a proven bad treatment, or quack medicine?

How do you know that your immune system shuts down for 6 hours?

So you know that medicines have side effects. What can save one life kills another. Nothing is perfect. There are no magic bullets. I'm glad you realize that. But be careful about using advertising as any form of evidence.