Barberries and berberine

From what I have looked at: some berberine can be  made from some roots, rhizomes, stems, and bark. But that method can have side effects that you don't get from barberries, which are also a good source of berberine.

Barberries may be the most antioxidant packed fruit available, and may have many health benefits.


9 Impressive Health Benefits of Barberries
https://www.healthline.com/nutrition/barberries

In spite of the title, this video discusses a few benefits of barberries, not just treating acne.

Treating Acne with Barberries