MRL Ltd.´s Poria cocos powder contains both mycelium and primordia (young fruit body) cultivated into a biomass that is grown on a sterilised (autoclaved) substrate.
This cultivation process ensures the powder is free from contamination by other fungi and that pesticides and heavy metals are absent.
The cultivation system is proprietary, allowing for standardised production of Poria cocos. The powder biomass is then sealed in plastic containers.

The Poria cocos is processed under the same rigorously controlled conditions that are applied to the manufacture of a conventional pharmaceutical. This ensures that each tablet contains 500g of the standardised Poria cocos product.
The tablets are film coated to protect them from moisture, thus preserving the quality of the product and ensuring a long shelf life.
After passing quality control testing the tablets are released for use. The choice of additives used in manufacture renders these tablets sitable for Kosher or vegetarian use.

The fungal biomass Poria cocos that comprises Poria-MRL is certified 100% Organic in the United States by Quality Assurance International.
In December of 2005, MRL powder gained EU organic certification in accordance with EU Council Regulation (EEC) No. 2092/91 by Quality Assurance International.