One of the most important active ingredients in cinnamon is cinnamaldehyde. It’s used in flavorings and fragrances. It may be responsible for some of cinnamon’s possible health benefits. Some research shows cinnamon may be good for people with diabetes. A review of 18 studies suggests that cinnamon might lower blood sugar. It may also lower cholesterol in people with diabetes. One review suggests that cinnamon might help with obesity and weight loss. It’s sometimes used for irritable bowel syndrome or other stomach or intestinal problems. These are sold as 1 inch cut cinnamon.