Magnesium Oxide powder by BulkSupplements.com is one of the selections of our mineral supplement. This mineral supplement provide daily magnesium intake in your diet. Each serving of this magnesium supplement contains 835mg of Magnesium Oxide (with 500mg of Magnesium) which is about 1/3 tsp, and may need a 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 100g to 5kg in resealable bags Our Magnesium Oxide powder, or magnesium supplement, is pure, clean, and does not contain any filler, additives and artificial flavors. And this magnesium supplement, or Magnesium Oxide, is dairy free, soy free, gluten 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.