Berberine HCl powder by BulkSupplements.com is one of the selections of our dietary supplements. Berberine is a natural compound found in goldenseal. Each serving of this product contains 500mg or Berberine HCl which is about 1/5 tsp, and may need an accurate milligram scale to measure. Contents of this product is sold by weight, not volume and settling may occur. And, we also sell it different sizes ranging from 25g to 1kg in resealable bags Our Berberine HCl powder, or berberine supplement, is pure, clean, and does not contain any fillers, additives and artificial flavors. And this Berberine powder, in Berberine HCl form, is dairy free, soy free, yeast free, no added sugar. All products by BulkSupplements.com are manufactured according to cGMP Standards to ensure the highest quality for manufacturing, packaging, labeling, and holding operations. We work with a third-party laboratory that test our products at multiple stages during production, from raw material to finished products, and ensures compliance, standards, and consistency.