Mediki
Thyroid test tracker: follow TSH, FT4 and FT3 over time
If you have a thyroid condition, you probably get the same blood tests several times a year. Mediki turns each lab report into one timeline, so you can see how TSH and thyroid hormones respond to every change.
Thyroid tests you can track
- TSHTSH measures pituitary signaling that controls thyroid hormone production.
- Free T4Free T4 measures the unbound fraction of T4 that can enter tissues and convert to T3.
- Free T3Free T3 measures the unbound active fraction of T3 available to tissues.
- T4T4 measures thyroxine, the main thyroid hormone precursor in circulation.
- T3T3 measures triiodothyronine, an active thyroid hormone that affects metabolism, heart rate, and energy use.
- TPO AntibodiesTPO antibodies measure immune activity against thyroid peroxidase.
- Thyroglobulin AntibodiesThyroglobulin antibodies measure immune activity against thyroid proteins.
Why thyroid results are worth tracking
Thyroid treatment is usually adjusted step by step, and TSH is typically retested after each change. Results also vary a little from test to test, so a single number rarely tells you much on its own.
Seeing TSH next to free T4 across several tests makes it much easier to notice a trend and to talk it through with your doctor than comparing loose printouts.
Things that can affect thyroid results
- Biotin: high-dose biotin supplements can interfere with some thyroid tests. Tell your doctor if you take them.
- Timing: TSH follows a daily rhythm, so testing at a similar time of day makes results easier to compare.
- Different labs: reference ranges and units differ between laboratories. Free T4 is reported in pmol/L or ng/dL, where 1 ng/dL = 12.87 pmol/L.
How Mediki helps you follow your thyroid
- Upload thyroid results as a PDF or a photo, including older reports.
- Mediki converts free T4 and free T3 to one unit, so results from different labs share a chart.
- Create a “Thyroid” group to open TSH, FT4, FT3 and antibodies together.
- Each result is shown against the reference range printed on its report.
Track your thyroid results in one chart
Upload your lab reports as PDFs or photos. Mediki reads every value, converts units and charts each marker against its reference range. Your first 15 pages are free.
Try 15 pages freeFrequently asked questions
How often should thyroid levels be checked?
That depends on your situation, and your doctor decides. Tests are often repeated more frequently while a dose is being adjusted and less often once results are stable. Mediki keeps every result in one timeline, however often you test.
What is the difference between TSH and free T4?
TSH is a signal from the pituitary gland that tells the thyroid how much hormone to make. Free T4 is the main hormone the thyroid produces, measured in its unbound form. The two are usually read together.
Can Mediki track thyroid antibodies?
Yes. TPO antibodies and thyroglobulin antibodies are tracked like any other marker, each with its own chart.
Medical disclaimer: This page is general information, not medical advice. Reference ranges differ between laboratories, and only a doctor can interpret your results in the context of your health.