Healing tea

There are some little stores on the turnpikes. One of these announce by some little billboards that it have the tea which heal rheumatism and column (I have to use: sic). Obvious these ills can't be healed by teas, but some people can try buy the mencioned tea. It's a case of quackery.
It's not a thing which doesn't matter; people can decide consume the tea and wait a little more to talk with a doctor, or even stop to take medication to drink the tea.
Not everytring from nature heals, not everything natural is good.