Kidney Disease: Improving Global Outcomes (KDIGO) Clinical Practice Guideline for Glomerulonephritis recommends angiotensin-converting enzyme inhibitors (ACE-I)/angiotensin-receptor blocker (ARB), corticosteroids, and immunosuppressive agent treatment according to the level of the urinary protein and renal function of IgAN patients [4]. Here, ACE is linked to kidney disorder.