Cordyceps Biomass Powder. This lab-grown biomass powder is 10% cordyceptic acid, and is produced by Plum Flower Chinese Herbs. As with all Plum Flower Brand products, it is certified to be free of sulfites and other fumigants. Personally, I feel this powder has the nicest flavor (well rounded, earthy) of the powdered, lab-grown cordyceps products. It is the same powder that is the in Plum Flower cordyceps capsules.