 This case report highlights the importance of recognizing hyperoxiluria as a possible cause of acute and chronic kidney disease in patients who are pursuing intensive dietary weight loss interventions. It also emphasizes the need for close monitoring of patients undergoing such interventions, especially those with risk factors for hyperoxiluria such as diabetes, gout, and obesity. This article was authored by Gibran Kniezer, Amad Altee, Meher Esmalik and others.