If you are eating plain oatmeal and the amount is controlled, it usually does not affect your blood sugar, whereas if you are eating oatmeal with added sugar or if you are eating too much of it, it may have an effect on your blood sugar. Oatmeal is a relatively common coarse grain, take pure oatmeal for example. Each 100 grams of raw oatmeal contains 377 calories, of which 58.1 grams of carbohydrates, 9.5 grams of dietary fiber, 11 grams of protein and 8.7 of fat. Which is rich in dietary fiber, but also contains energy, protein, carbohydrates, as well as calcium, potassium, phosphorus, iron, zinc, B vitamins and a variety of amino acids needed by the human body. Normally, eating some oatmeal properly is more beneficial to health, such as being able to provide the body with a variety of nutrients to maintain life activities. In general, if you just eat some oatmeal properly, and eat pure oatmeal, usually does not affect blood sugar, the fiber in it will also slow down the rate of absorption of carbohydrates. On the other hand, if you eat too much oatmeal on a regular basis or eat processed oatmeal with more sugar, it may have an effect on your blood sugar and cause it to rise. If your blood sugar is high, you must eat oatmeal in strictly controlled amounts, and you should try to choose to eat pure oatmeal and avoid over-processed oatmeal.