What is the shelf life of RX Nut Butter? 12 months from the date they are made. Find the exact Best By date printed on the right edge of the back of your RX Nut Butter pouch. Buy nut butters here Related articles Can I eat RXBAR products past their best by date? How should I store RX Nut Butter? What is the shelf life of RXBARs? Where are RXBAR products made? What is the shelf life of RXBAR Layers?