> These people are desperate for relief, so they’re often cycling through 10s of supplements or quack treatments at a time. If they spontaneously go into remission, they’ll swear it was due to the supplements.

Can you blame them for trying to help themselves? I don't think any of them claim to be conducting scientific studies.

If I ever have a condition that medical science can't explain or treat, I might find myself clutching similar quack remedies myself, despite all my vaunted rationality.