Why do I feel cold all the time on a GLP-1? ("Ozempic chills")
The short answer: Feeling cold usually tracks with losing fat and a slightly lower metabolic rate — real, common enough to be flagged in research, and usually harmless. This is an under-reported but real symptom cluster.
Why it happens
Rapid fat loss reduces your body's insulating layer, and losing weight quickly can slightly lower your resting metabolic rate — both make you run colder than before. A 2026 analysis of GLP-1 users flagged temperature changes and chills as a genuinely common, under-documented experience.
How long it lasts
It tends to track with the pace of your weight loss and often steadies as your weight and intake stabilise.
What helps
- Make sure you're not under-eating — very low intake makes you colder
- Hit your protein target to protect metabolically active muscle
- Layer up and keep moving to generate heat
- Ask your doctor to check thyroid, iron, and B12 if it's severe
When to call your doctor
- Cold with a real fever, chest pain, or confusion
- You can't get warm no matter what you do
Track this against your dose. Logging feeling cold week by week shows whether it's actually easing — and gives your prescriber real data.
Related symptoms
Educational information from Calqulate.net — not medical advice, diagnosis, or treatment. Follow your prescriber's instructions and contact a licensed clinician about your symptoms.
