How long can you keep slippery elm?

Slippery elm powder can typically be stored for about 1 to 2 years if kept in a cool, dry place away from direct sunlight. Whole slippery elm bark has a longer shelf life, potentially lasting up to 3 to 5 years when stored properly. Always check for any signs of spoilage, such as changes in color or smell, before using it. To maximize freshness, consider sealing it in an airtight container.