Porridge also contains sugar inside, as follows: 1, sugar in a broad sense actually refers to carbohydrates, carbohydrates include monosaccharides, disaccharides and polysaccharides, porridge is boiled by rice, millet and other grains, rice, millet and other grains contain carbohydrates, so porridge also contains sugar inside. 2, most of the understanding may be refined sugar, such as glucose, fructose, white sugar, maltose, etc., which belongs to monosaccharides or disaccharides, in 3, rice mainly contains starch, which is a polysaccharide, the digestion and absorption rate is slower than monosaccharide and disaccharide, but after processing and boiling, the digestion and absorption rate will also be greatly increased, also easy to cause fluctuations in blood sugar, which is why it is not recommended that diabetics often drink porridge.