Tirzepatide Plus Extreme Dieting Triggered Dangerous Ketoacidosis Despite Normal Blood Sugar

A 30-year-old man with no known diabetes developed euglycemic diabetic ketoacidosis (EDKA) — a dangerous acid buildup in the blood without the expected high blood sugar — while taking tirzepatide for weight loss combined with intermittent fasting and a low-carbohydrate diet. The combination of a GLP-1/GIP receptor agonist with ketosis-inducing dietary restrictions created a perfect storm for this rare but serious complication.

Single case report describing the clinical presentation, diagnosis, and management of euglycemic diabetic ketoacidosis in a patient using tirzepatide alongside dietary interventions for weight loss.

As tirzepatide and other GLP-1 drugs become increasingly popular for weight loss, many users are combining them with aggressive dietary strategies like keto diets and intermittent fasting without medical supervision. This case warns that the combination can cause a life-threatening metabolic emergency — one that's especially dangerous because blood sugar stays normal, making it easy to miss.

With millions of people now using GLP-1 drugs for weight loss, often obtained through telehealth or compounding pharmacies with limited follow-up, the risk of dangerous drug-diet interactions is growing. GLP-1 drugs already reduce appetite significantly; combining them with fasting and carbohydrate restriction can push the body into a starvation-like state where it burns fat for fuel and produces dangerous levels of ketone acids. This case adds to a small but growing body of reports warning about EDKA with GLP-1 drugs and underscores why medical supervision matters.

Single case report — cannot establish causation or determine how common this complication is. The relative contribution of tirzepatide versus the dietary restrictions versus possible undiagnosed diabetes is unclear. Case reports represent the lowest level of clinical evidence.