How should I store RX Nut Butter? Our nut butter should be stored in a cool, dry place. Pouches and jars do not need to be refrigerated, even when opened. Related articles How do I use RX Nut Butter? Why does the oil in RX Nut Butter separate? What is RX Nut Butter? Where can I find RX A.M. Oats? Where do I find the nutrition facts for your products?