Chia seeds are a nutritious superfood that can be enjoyed in many different ways. Though they are generally shelf-stable, over time they can lose their freshness and flavor. Here are a few signs to look for that will tell you if your chia seeds have expired:
The color of the seeds may change from white or pale gray to brown or black.
The texture of the seeds may become hard or brittle.
The flavor of the seeds may become bitter or off.
If you notice any of these changes in your chia seeds, it's best to discard them and get new ones. To prolong the freshness of your chia seeds, store them in an airtight container in a cool, dark place like the pantry or fridge.