See your TSH, free T4, free T3, reverse T3 and thyroid antibodies against your lab’s range and the narrower range thyroid clinicians aim for, with what the pattern may mean and what to ask next.
This tool explains thyroid lab results for education only. It doesn’t diagnose, treat or replace a clinician, and it doesn’t change your medication. Optimal ranges are the ranges Paloma Health’s clinicians use; lab ranges and clinical guidelines may differ. Your results stay in your browser and aren’t stored or sent anywhere.
Enter a value on the left, or try the example, to see each result against the lab range and the range Paloma’s clinicians aim for.
Medically reviewed by Andrew Cunningham, MD, November 12, 2026.

It compares each result with your lab’s range (or a typical US range if you don’t enter one) and with the narrower range Paloma’s clinicians aim for, then looks at how your results relate to each other: TSH with free T4, free T3 with reverse T3, and antibodies.
No. The analyzer runs entirely in your browser. Nothing you enter is saved or sent anywhere.
No. It explains what results can mean, for education only. A diagnosis needs a clinician who knows your symptoms, history and examination.
Thyroid medication changes what’s expected. On medication, Paloma’s clinicians aim for a slightly narrower range, and a TSH below 0.4 is flagged whichever medication you take. If your medication contains T3, it also asks when you took your dose, which can change free T3.
Biotin can make TSH look falsely low and free T4 and T3 falsely high on many lab tests, which can mimic an overactive thyroid.
It depends on whether you have hypothyroidism. On thyroid medication, it compares TSH with the treatment target thyroid specialists aim for when you’re pregnant or trying to conceive: 2.5 mIU/L or lower. Without a thyroid condition, a TSH above that target isn’t a problem in itself: in pregnancy it’s read against your lab’s pregnancy range (about 4.0 in the first trimester if your lab doesn’t give one), and when trying to conceive against the usual range. Free T4 and free T3 change in pregnancy and vary by lab, so they’re shown but not graded. Decisions in pregnancy are time-sensitive, so review your results with your clinician or OB soon.
It works with TSH alone, but a fuller panel tells you much more. Free T4, free T3 and antibodies can explain symptoms a TSH misses.


Our thyroid specialists look at your full panel, your symptoms and your history, and build a treatment plan with you. Video visits from home.
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