Berberine is currently being studied in relation to controlling diabetes and perhaps preventing it.
Berberine has been shown to inhibit the growth of bacteria in tests and may help the immune system function better.

We grow this plant and it is one mean shrub. The thorns are very sharp and plentiful. It can sneak everywhere so you have to keep it caged.
Despite its thorny nature Barberry has been helping mankind since the ancient Pharaohs.