If I buy chicken meat and the package has pork in it, I'm going to notice. But if a vitamin supplement is actually nothing but chalk, would I notice? Probably

If I buy chicken meat and the package has pork in it, I'm going to notice. But if a vitamin supplement is actually nothing but chalk, would I notice? Probably not. Nor would it poison me, but I think getting ripped off is more likely than being poisoned.