Eating and Nutrition 18 Signs of Gluten Intolerance by Shannon Kelley - Culinary Professional 18. Dental Issues. Image from stylecraze.com You may wonder how dental issues can be caused by gluten intolerance but it’s thanks to issues with absorbing calcium into the body. This can lead to an increase in cavities as well as mouth ulcers. ---Advertisement--- Page 18 of 18 Prev Next ---Advertisement---