yes, can cause vitamin deficiencies that deprive your brain, bones, and other organs of vital nourishment, but you can effectively manage through your diet.
check:
http://digestive.niddk.nih.gov/ddiseases/pubs/celiac/
http://www.celiac.org/
http://www.webmd.com/digestive-disorders/celiac-disease/celiac-disease-topic-overview