A method of introducing an additive to a biological material using a supercritical fluid is disclosed. The method comprises placing the biological material in a processing chamber, adding an additive to the supercritical fluid to form a supercritical fluid-additive mixture, adding the supercritical fluid-additive mixture to the processing chamber, and pulsing the mixture in the processing chamber. A processing system for introducing an additive to a biological material using a supercritical fluid in accordance with the present invention comprises a processing chamber for housing the biological material, a vat for storing a processing fluid, a pump, a heating element, an inlet port, and a flow path.
