Also, what is flax seed oil—and can you use it for cooking? We spoke to experts who share how to eat flax seeds, including how to grind flax seeds at home and tips for proper storage.

Flaxseeds are tiny, golden-brown seeds from the flax plant (Linum usitatissimum), a blue flowering annual herb. Flax is cultivated in over 50 countries, and Canada and India are among its most ...