Jamaica is a relatively small island but it contains a wealth of tonics. Health consciousness permeates almost every aspect of the culture. You can’t eat anything in Jamaica without being reminded of the health benefit or reason for eating it.
One popular beverage is called ‘Roots’. It comes by many colorful and descriptive names. If you look for ‘Wood Root’ or ‘Roots’, you should be able to find it. One very popular one is this one:

There are about as many different formulations as there are names for this drink. Some are extremely bitter. Some are sweetened and fermented.
Jamaicans say these drinks are ‘good for the back’. You need a strong back to accomplish things in life, among other things.
Try it and report back!