Freeze-dried extracts and materials typically have a shelf life of up to 10 years (5 years for venoms). This means that one lot can often be used over the course of several years, which can reduce lot-to-lot variability. In addition, the shelf life is dependent on your intended use of the material and whether it is stored refrigerated or frozen. The freeze-dried extracts and materials we provide are stored as listed on the Certificate of Analysis (COA).