How quickly does GLP-1 medication lower A1C?
A1C often begins to ease within the first weeks of therapy and keeps drifting down for several months as the dose climbs and weight comes off. In trials of semaglutide and tirzepatide for type 2 diabetes, average A1C drops of roughly 1.0 to 1.5 percentage points by week 24 are commonly reported, with larger drops at higher starting A1Cs. Without diabetes, the change is usually smaller. These are general patterns from published trials, not a prediction for you. The trend matters more than any single number: a steady downward slope is what many people watch for. Phaze plots A1C alongside your dose schedule, so a drop after a step-up is easy to spot and a stall is just as easy to surface for a doctor visit.
Phaze Guides
Read the full guide on lab tracking on GLP-1
Which labs people track, how often, and how to read your trends in plain language.
Related questions
- What labs should I get before starting GLP-1 medication?
- How often should I get bloodwork while on GLP-1?
- Does Ozempic affect liver enzymes?
- Which lipid panel should I run on GLP-1?
- How is kidney function monitored on GLP-1?
- Should I check my thyroid on GLP-1 medication?
- Is vitamin D deficiency common on GLP-1?
- How do I read my own lab results?
- How does Phaze track lab results compared to a notebook?
Track every lab. Understand every value.
Phaze is a wellness and habit-tracking app, not a medical device, and does not provide medical advice. Talk to your doctor.