Low blood levels of can lead to disturbances in heart rhythm, a leading cause of death among people with eating disorders. potassium sodium chloride glucose

Potassium because it is used as a signaling molecule in the nervous system.

I believe an eating disorder would have to be something along the lines of a meat heavy diet like the Eskimo’s. Scurvy although not the same, has to do with low fruit intake.

Your gonna need to upload an image with the question : )