In the latest column by UTMB’s Dr. Victor S. Sierpina: Lentils are high in protein and fiber, are a low-carb, low-glycemic food that is great for those with cholesterol problems, diabetes and heart disease. They are rich in minerals, like iron, magnesium, manganese and copper; vitamins, especially folic acid; and are very low in fat but have some healthy omega 3 and omega 6 fatty acids.