Hi Leslie,
Our powders are packed fresh so have a two year shelf life from date of purchase. We recommend storing them somewhere dark & dry, keeping them free of moisture to ensure longevity. Somewhere like a cabinet or pantry is perfect. You can opt to keep them in their original packaging, and just reseal after use, or transfer to an airtight container, something opaque is ideal but not necessary if it's stored away from light. Enjoy!