While lectins can be dangerous when consuming in large concentrations, many nutrient-dense foods contain quite a bit of them. Legumes and whole grains are rich in fiber, iron, zinc, and B vitamins. When consumed in combination, they even form complete proteins, which are essential for the growth and normal maintenance of body tissues. A diet rich in these legumes and whole grains is associated with a lower chance of cardiovascular disease, weight loss, and type 2 diabetes. Because lectins are proteins that bind to carbohydrates, they slow down the digestion and absorption of carbohydrates. As a result, sharp rises in the blood sugar level may be prevented.