Conclusions
Eating disorders are not uncommon and can have serious consequences on the adolescents and young adults who are disproportionately affected by them. Among these consequences, acute and chronic kidney diseases are common and may be severe. Acutely, electrolyte abnormalities, nephrolithiasis, acute kidney injury, and refeeding syndrome may be most apparent, whereas chronically, it is notable that AN is a risk factor for CKD and ultimately for kidney failure. Accordingly, patients with AN should have kidney function and markers of kidney damage assessed. However, detecting and monitoring kidney disease in these patients is a challenge, reflecting inaccuracies associated with the commonly used methods to estimate GFR. Accordingly, we suggest that reference methods be considered in this population and are optimistic that newer kidney biomarkers may have high utility in this population.