I've tried 2 other brands of artemisinin-based supplements for Babesia duncani, and this one is the strongest and most effective. It was recommended in The Townsend Letter in 2015 (Google it and Babesia for details), and I've found them to be a reliable source of quality information. I'm thankful Dr. Zhang has made this available in a double-strength formulation, because this organism develops resistance to arteminsinin in time. It bothered my stomach at first, but I started taking it with marshmallow root and aloe vera, and the irritation went away. Highly recommended.