Should I check my thyroid on GLP-1 medication?
A baseline TSH is reasonable for almost anyone starting a GLP-1, mostly because it catches people who already have an unrecognized thyroid issue rather than because the medication causes one. If your TSH is borderline or your symptoms suggest thyroid trouble, your doctor may add free T4, free T3, and sometimes TPO antibodies. People with a personal history of medullary thyroid carcinoma or multiple endocrine neoplasia type 2 should not take semaglutide or tirzepatide; this is a prescribing question for your clinician. After baseline, an annual TSH is enough for most people on stable thyroid status. Phaze plots TSH, free T4, and free T3 on a single chart so you can show your doctor the full picture in one screen.
Phaze Guides
Read the full guide on lab tracking on GLP-1
Which labs matter, how often to check them, and how to read your trends in plain English.
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?
- How quickly does GLP-1 medication lower A1C?
- Which lipid panel should I run on GLP-1?
- How is kidney function monitored on GLP-1?
- 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 provides general health software, not medical advice. Talk to your doctor.