Vitamin D3 powder, or Vitamin D3 5000 IU powder, by BulkSupplements.com is one of the selections from our vitamin supplements. Vitamin D is a essential vitamin which is important for calcium absorption.* Each serving of this product contains 50mg, where contain 125mcg (5000IU) of Vitamin D3 in cholecalciferol form, which may need an accurate milligram scale to measure. And, we also sell it different sizes ranging from 100g to 5kg in resealable bags. Contents of this product is sold by weight, not volume and settling may occur. Our Vitamin D powder, or Vitamin D3 5000IU powder, is unflavored and easy to use in any beverage like water, juice or smoothies. And this Vitamin D3 powder is dairy free, gluten free, soy free, and yeast free. 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.