A necessary component of all dried extract powders, required during the spray drying stage to allow extraction and to prevent clumps from forming and to assure smooth flow of the machinery during encapsulation. 100% of all extracted powders contain some excipient. There are natural and unnatural (synthetic) excipients, and most producers use the latter. These excipients might include substances such as silicon dioxide, magnesium stearate, etc. Dragon Herbs uses almost exclusively natural excipients such as bamboo powder, tapioca powder and rice bran powder.