[header] How to maintain strong bones when you have crohn's disease [title] Take a calcium supplement. [step] Because your intestine doesn't absorb nutrients the way it should, you might not get all the calcium you need from your food. If you have low calcium, talk to your doctor about whether you should take a calcium supplement. 
Calcium promotes strong bones and is important for keeping your bones healthy. [substeps] The average recommended daily dose is 1 , 000 milligrams (mg) for adults up to age 50, and 1 , 200 mg for adults age 51 and over.