what vitamin deficiency causes mouth sores
5 Weird Signs That You're Vitamin-Deficient Here are five unusual warning signs that you may be vitamin-deficient. The good news: Most are fixable with dietary tweaksâall the more reason to make nutrition a top priority. But if food cures don't work, be sure to check in with your doctor. Body Cue No. 1: Cracks at the corners of your mouth. The Deficiency: Iron, zinc, and B vitamins like niacin (B3), riboflavin (B2), and B12. It's common if you're a vegetarian to not get enough iron, zinc, and B12, Blum says. Ditto if you're skimping on essential immunity-building protein due to dieting. How Vitamin B12 deficiency causes Canker Sore How does the lack of Vitamin B12 cause you to be more susceptible in developing Canker Sore? The pathophysiology of Vitamin B12 deficiency leading to development of canker sores is yet to be established. Although the link between Vitamin B12 deficiency and canker sore is not conclusive, there are numerous case studies demonstrating the possible causative relationship.