It’s no secret seeds are healthy—like, really, really healthy. We use them as salad toppers for extra crunch, blend them into smoothies for more protein, and sprinkle them atop yogurt parfaits for bonus healthy fats. While virtually every seed packs some serious nutritional punch, they’re not all created equally. Take flax seeds and chia seeds, for example. These two powerhouse seeds are often considered interchangeable, however they do possess unique qualities that are worth highlighting. If you’ve ever wondered how flax seeds and chia seeds differ, experts are here to offer some insight.