Red lentils nutrition facts include total carbohydrate content of 20 g, out of which there are 8 g of dietary fiber and 1.8 g of sugar. It has 9 g of protein in it. Moreover, it also has 2% of the daily recommended dosage of Vitamin C, 18% of iron, 1% of calcium, 10% of vitamin B-6, and 9% of magnesium.