We work with a company headquartered in Canada that grows the mushrooms on their natural substrates from USDA certified organic farms mainly in China. We receive a certificate of analysis with every batch that tests for alpha/beta glucans, heavy metals, moisture, and microbiological. The powders are created using a hot water extract to break down the cellular walls of the mushrooms as well as extract the water soluble components, in a 1:1 extract ratio.