The herbs which contain berberine are barberry, goldenseal, and Oregon grape.
Goldenseal is one of the dozens of herbs with which I experienced during the six months I was trying to create a workable diet and treatment for a Candida overgrowth. I never received so much as an hour of die-off from the herb. But of course, as always, it’s up to you whether or not you want to experiment with these herbs yourself, if so, they’re sold at almost any vitamin store.
About the research:
Berberine is an alkaloid found in certain herbs. This particular alkaloid is a mild antifungal which makes it capable of killing Candida yeasts. However, with this ability, berberine is also capable of destroying healthy gut flora and is know to cause damage to the intestinal lining. Berberine also is noted as raising the blood pressure and depleting the body of potassium.
These are the reasons why I’ve never recommended herbs which contain berberine on the forum, especially since there are plenty of safer herbs to choose from.