Mushrooms. Immune Support. Non-GMO Project Verified. Lab Verified. Every Solaray product is subjected to rigorous testing and screening protocols based on the latest cGMPs (Current Good Manufacturing Practices) and U.S. Pharmacopeial Convention (USP) monographs. The process may vary by ingredient, but typically includes organoleptic (taste, touch, smell) testing to compare it to previous batches, and lab assays for microbial, identity, purity, and potency validation. Only when an ingredient has passed all of the required assays is it released from quarantine to manufacturing.