What is Berberine? We are glad You asked! Berberine is an almost unbelievable supplement with a plethora of proven health benefits. It is a natural alkaloid extracted fromplants. An eastern medicine well known for it's healing power. Why choose Dr. Martin's Berberine? Dr. Martin's high potency, veganic Berberine supplement is notorious for enhancing immune system, regulating blood pressure and cholesterol levels, and supporting glucose metabolism!