OGT Study Guide 2026
Everything you need to pass the OGT exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 OGT Exam Format at a Glance
📚 OGT Topics to Study (23)
✍️ Sample OGT Questions & Answers
1. Which finding on OGTT follow-up indicates that a previously prediabetic patient has progressed to type 2 diabetes?
A fasting plasma glucose ≥126 mg/dL confirmed on repeat testing meets ADA criteria for diagnosing type 2 diabetes mellitus.
2. What is the primary storage form of glucose in the human liver and muscle?
Excess glucose is polymerized into glycogen in the liver and skeletal muscle for short-term energy storage.
3. Which OGTT finding is most consistent with early-stage insulin resistance?
Normal fasting glucose with an elevated 2-hour glucose suggests the pancreas can maintain basal insulin but struggles to handle a glucose challenge, typical of early insulin resistance.
4. For how long after glucose ingestion are blood draws typically taken in a standard 2-hour OGTT?
In the standard 2-hour OGTT, blood is drawn at fasting baseline and again at 120 minutes post-ingestion.
5. Which of the following best describes the term 'glucose tolerance'?
Glucose tolerance refers to the body's capacity to metabolize and return blood glucose to normal levels following a glucose challenge.
6. How many hours of fasting are required before taking the OGTT?
A fasting period of at least 8 hours, but no more than 14 hours, is required before an OGTT. This ensures that the patient's baseline blood glucose level is not influenced by recent food intake. It provides an accurate starting point for assessing the body's response to the glucose load.