Quercetin Dihydrate powder, or Pure Quercetin powder, by BulkSupplements.com is one of the selections of our dietary supplements. Quercetin is a compound called flavonoids that has antioxidant properties which are essential for overall wellness.* Each serving of this product contains 1000mg which is about 1/3 tsp, and may need an accurate gram 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 50g to 500g in resealable bags. Our Quercetin powder, or quercetin supplement, is pure, clean, and does not contain any fillers, additives and artificial flavors. And this Quercetin Dihydrate powder, or Quercetin 1000mg, is dairy free, gluten 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.