This medium-size green lentil is actually considered a standard against which other medium lentils are measured. Besides, Richlea lentils are milder in flavor than their larger cousins, not to mention that they are most often used in soups or in any other recipe calling for green lentils. When it comes to their nutritional benefits, all lentils are full of polyphenols, which are active compounds that fight against harmful agents in the body—everything from ultraviolet rays and radiation to heart disease and cancer.