Why are beans, nuts, and whole grains so health promoting? Maybe it’s because they are all seeds. Think about it: All it takes for an acorn to explode into an oak tree is water, air, and sunlight. Everything else is contained within the seed, which possesses the entire complex of protective nutrients required to mature into a plant or tree. Whether you’re eating a black bean, a walnut, a grain of brown rice, or a sesame seed, in essence you’re getting the whole plant in a tiny little package.