How should I store these freeze-dried sesame seeds to maintain their crunch and prevent the natural oils from going rancid?

Because these seeds are freeze-dried, they are highly hygroscopic, meaning they absorb moisture from the air very quickly. Exposure to humidity will cause them to lose their characteristic crispness and become chewy or soft. To maintain the texture, keep the package tightly sealed when not in use, or transfer the contents to an airtight container immediately after opening.

Additionally, sesame seeds are rich in unsaturated fats, including linoleic and oleic acids. While the seeds contain sesamin, a natural antioxidant that helps protect these fats from oxidation, prolonged exposure to heat, light, or air can still lead to rancidity. Store the container in a cool, dark cupboard away from the stove or direct sunlight. For longer-term freshness, especially in warmer climates, refrigeration or freezing in an airtight container is recommended. Always check for any off-odors before use, as this indicates the oils have spoiled.