Hemp hearts are the most nutritious part of the hemp seed, which rose to popularity in 2013. Three tablespoons contains a whopping 10 grams of protein. “They are a great source of omega-3 fatty acids, iron, and magnesium," says Bajaj. "Magnesium is important for a lot of things, and so many of us are deficient in magnesium. It helps with digestion, muscle cramps, and is even helpful for migraines and stress relief.” Sprinkle hemp hearts on your salad, yogurt, or cereal, or enjoy a handful straight from the bag.