Treatment : CO Treated (Allowed by FDA) / Tasteless Smoke (Allowed by FDA) / Natural. Storage & Distribution : Boxes are closed at all times & store at below -18 °C Best Before : 24 months from Production Date. Instruction for use : When thawed keep chilled at below -4°C or 38 °F. Do not refreeze after thawing. Thaw under refrigeration, remove from vacuum package before thawing. Use immediately after thawing.