Have you started craving chocolate so much that you dream of visiting the Hershey factory? Do you consider salt one of the major food groups? Or maybe you can’t stay away from the sweet stuff.

It might not be your willpower that is collapsing. Food cravings can be triggered by nutrient deficiencies. Research by the Academy of Nutrition and Dietetics has found that the urge to eat certain foods may be a symptom of a specific vitamin or mineral shortage.