Most of our calcium absorption takes place in the proximal portion of the small intestine. This is the area that is damaged by celiac disease. Therefore, many people with celiac disease have osteoporosis due to poor absorption of calcium. Calcium in the diet is important for strong bones and teeth. Most people think about consuming dairy products as a way to increase calcium intake. There are actually many other sources of dietary calcium that are lower in fat than dairy products. These non-dairy sources do not contain the enzyme lactose. This is beneficial for those with celiac disease who are also lactose intolerant.