Raw material purchased by a health food lab are not depleted all at once.
Typically raw materials in a health food lab are purchased in bulk and rarely used immediately upon opening. With improper storage, deterioration, discoloration, and clumping of the raw material would likely occur. And as a result, samples and finished products would not yield pure samples. This is not only a waste of money, time, and resources, it would also affect the company's brand.