Humans have been eating these for good health as far back as 9,000 B.C. If you don’t eat enough fish, adding flax to your diet can help you get omega-3 fatty acids, the healthy fats that are good for your heart. It’s the best plant source of this important nutrient, and it gives you a good dose of fiber, too. When the seeds are ground into flax meal, they may help lower blood pressure. Flax has a nice, nutty flavor. Add a scoop to oatmeal, your pancake batter, or salads.