How to Test Thyroid Function at Home: Kits and Accuracy

You test thyroid function at home by pricking a finger, dropping blood onto a collection card and mailing it to a lab. None of the home kits compared below uses saliva or urine.

Everlywell’s Thyroid Test costs $149 for four markers, and LetsGetChecked sells five markers for $119, as of October 2026.

Published studies support blood-spot TSH, which reads lower than a standard draw. Everlywell adds a free physician consult after certain abnormal results. Its physicians can prescribe treatment in 33 jurisdictions, which don’t include New York or New Jersey.

If you’re considering a home thyroid test, I’d look at the follow-up as closely as the kit itself. Collecting the sample is one step; understanding what the results mean for you is another. Your thyroid is a small gland at the front of your neck, and its hormones control how your body uses energy.

Everlywell is a US company that sends you a finger-prick kit, has a certified lab analyze the dried blood, and posts your results online. Its $149 Thyroid Test is the only Everlywell kit that measures TSH, free T4, free T3, and TPO antibodies together. Published adult studies have compared blood-spot TSH with a standard blood draw, but not free T3 or free T4. That distinction matters when you’re deciding what you can learn from a home test.

See Everlywell’s $149 Thyroid Test

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What a thyroid function test measures

Thyroid testing starts with thyroid-stimulating hormone, or TSH. The pituitary gland makes TSH to tell the thyroid how hard to work. The American Thyroid Association (ATA) calls it the best first test.¹ A high TSH usually means an underactive thyroid, called hypothyroidism. A low TSH usually means an overactive thyroid, called hyperthyroidism.

Everlywell’s panel includes three additional markers. Free T4 is the active form of the main thyroid hormone. According to the ATA, reading it alongside TSH shows how the gland is working. Free T3 is the other active hormone, but the ATA says measuring it is often unreliable and usually isn’t helpful.¹ TPO antibodies point to an autoimmune cause, such as Hashimoto’s thyroiditis.

Doctors use TSH and free T4 to check for an underactive thyroid.² Everlywell’s FAQ says no hormone result confirms hypothyroidism on its own. A clinician also needs to consider your symptoms and medical history.

Can you test your thyroid with saliva or urine?

None of the home kits compared here uses saliva or urine. Everlywell, LetsGetChecked, myLAB Box, and Paloma Health use finger-prick blood samples. Labcorp and Quest draw blood from your arm. The ATA says a blood test is the only way to know for sure whether you have hypothyroidism.²

How to test thyroid function at home with Everlywell

Everlywell includes prepaid shipping both ways, written directions, and an instructional video. An independent physician licensed in your state reviews each order. If the physician decides the test isn’t right for you, Everlywell refunds your purchase.

1. Order the Thyroid Test. State availability appears at checkout. Everlywell ships only within the US, excluding territories and military addresses.

2. Register the kit. Scan the QR code on the box and register it to the person taking the test. Unregistered kits aren’t refunded or replaced.

3. Check for biotin. The ATA advises going without it for 2 days before thyroid blood tests because it can make normal results look abnormal.¹ Everlywell says its labs haven’t yet studied biotin’s effects on their testing and suggests asking your provider before changing supplements.³

4. Keep prescribed medication unchanged unless your doctor advises otherwise. Everlywell says not to stop prescribed medicine without your doctor. Your result will reflect your levels while taking it.

5. Collect and mail the sample. Prick your finger, fill the collection card as shown, and mail it before the kit’s expiry date.

6. Read your results online. Results usually arrive 5 to 7 business days after the lab processes your sample.

How accurate is a finger-prick thyroid test?

Published studies support the accuracy of finger-prick testing for TSH. Free T3 and free T4 from an adult blood spot haven’t been checked against a standard draw. Everlywell says its labs are CLIA-certified and that its home collection was validated against clinic testing. It doesn’t name the lab behind the Thyroid Test or publish thyroid-specific accuracy data.⁴

TSH from a blood spot

A 2023 Dutch study of 109 outpatients found that blood-spot TSH closely tracked results from an arm draw. It identified 6 of 7 cases of hypothyroidism with no false positives, although the authors called the findings preliminary.⁵ A 2026 Polish study of 246 adults placed 96% of participants in the correct thyroid category using a blood spot.⁶

Blood-spot TSH reads lower than a standard draw and needs its own reference range. In a 2022 UK study of 109 adults, it ran at roughly two-thirds of the matching standard result.⁷ Compare your home result only with the range printed on your report.

Free T3, free T4 and antibodies

We found no published study validating free T3 or free T4 from an adult finger-prick blood spot. Blood-spot free T4 research covers newborn screening. A research test for TPO antibodies in blood spots performed well in 182 adults, but it is a research assay. None of the home kit sellers compared here publishes accuracy figures for individual markers.

Repeating an out-of-range result

TSH can vary by up to 50% from day to day. The US Preventive Services Task Force (USPSTF) says a single result shouldn’t be used to diagnose thyroid disease.⁸ Many medical groups repeat an out-of-range result over 3 to 6 months before treating someone without symptoms, unless TSH is above 10.0 or below 0.1 mIU/L.

I’d keep the report’s reference range and the plan for follow-up together. A number is easier to understand when you know how the lab interprets it and who will help you decide what comes next.

At-home thyroid test kits compared

These five thyroid panels measure four or more markers and can be ordered online without going through your own doctor. Prices are current as of October 2026.

Smaller panels cost less. Labcorp lists its TSH and free T4 test at $89. Quest offers TSH alone for $49 plus the $6 fee. Our Everlywell review covers the company in more detail.

Everlywell Thyroid Test cost and Everlywell+ membership

Everlywell’s Thyroid Test costs $149 with free shipping. It accepts HSA and FSA cards because a physician authorizes each order. Everlywell doesn’t bill insurers, although it lists the Thyroid Test among kits more often considered for reimbursement. Ask your plan whether it will reimburse you.

Everlywell+ costs $39 a month for one credit. The Thyroid Test requires two credits, or $78. Members receive 20% off additional tests and virtual visits. An annual plan costs $449 and currently includes three bonus credits.

Credits expire, monthly fees aren’t refunded, and the membership isn’t insurance. It suits someone planning to retest. I’d consider how often you expect to use it before committing to a recurring payment.

Compare Everlywell’s Thyroid Test and Everlywell+ pricing

What happens after an abnormal result

Everlywell lists the Thyroid Test among its diagnostic panels.⁹ After certain abnormal results, a board-certified physician licensed in your state offers a free consultation. The physician may prescribe treatment where appropriate and legal. Very abnormal values prompt a phone call.

Prescriptions are available in 33 jurisdictions, including California, Florida, Illinois, Texas, and Washington, DC. New York, New Jersey, Maryland, and Minnesota aren’t on the list. Georgia, Ohio, and Vermont require video. Everlywell still recommends sharing your results with your own provider.

This article is for information only and is not medical advice. Talk to a doctor or licensed clinician before starting, stopping, or changing any treatment.

Thyroid function, mood and mental health medication

Thyroid problems can affect mood. The ATA lists feeling down and forgetfulness among signs of an underactive thyroid. An overactive thyroid can cause anxiety, irritability, and poor sleep. In older adults, it is sometimes mistaken for depression or dementia.

A 2021 analysis of 25 studies involving 348,014 people found about 30% higher odds of clinical depression in people with hypothyroidism. The link was stronger in overt cases than mild ones and was confirmed in women but not men.¹⁰ A thyroid result may explain some symptoms, while a doctor or therapist can assess mood symptoms directly. Our guide to depression symptoms lists signs to discuss.

People taking lithium need regular thyroid testing. UK guidelines call for a thyroid test before starting lithium and every 6 months during treatment.¹¹ An underactive thyroid is a well-documented effect of lithium. Everlywell identifies people who have taken lithium for six months or more as being at higher risk. Your prescriber handles those checks. Our guide to lithium side effects covers other effects.

If low mood has turned into thoughts of suicide, call or text 988 to reach the Suicide & Crisis Lifeline. In an emergency, call 911.

What Everlywell customers report

As of October 2026, Everlywell scores 2.7 out of 5 on Trustpilot from 541 reviews across all products. Of those ratings, 46% are five-star and 35% are one-star.¹² Nine reviews mention thyroid testing; eight give one or two stars. Reviewers describe kits they couldn’t register and results that took over a week. In July 2024, one reported that a promised physician follow-up after abnormal results never happened.

On Everlywell’s own site, the Thyroid Test averages 4.82 stars from 733 reviews collected by the company. Reviewers praise its ease of use, and one repeat buyer has used it more than ten times. Others describe slow return shipping. One found the results hard to compare after a later kit went to a lab with different ranges. A Trustpilot reviewer who tested with Everlywell and Quest on the same morning reported an Everlywell TSH more than a point lower.

Order Everlywell’s Thyroid Test

When Everlywell isn’t the right fit

Everlywell may suit someone without a thyroid diagnosis who wants an initial check with a physician consultation included. I’d compare the alternatives if cost, state restrictions, or ongoing medication monitoring are part of your decision.

Lowest price for a full panel: LetsGetChecked costs $30 less and includes thyroglobulin antibodies. Its thyroid page doesn’t mention prescriptions.

New York residents: Everlywell doesn’t prescribe in New York, and one support page says its at-home lab tests aren’t available there. myLAB Box is also unavailable. Quest’s thyroid pages don’t exclude the state.

People taking thyroid medicine or lithium: Your managing doctor orders draws at set intervals. Using one lab keeps the reference ranges comparable.

Suspected Graves’ disease: A doctor may order a thyrotropin receptor antibody test. None of the home kits includes it.

Pregnancy or estrogen birth control: Estrogen raises total thyroid hormone, so the ATA advises testing TSH and free T4 together.

The USPSTF found too little evidence to determine whether screening adults without symptoms does more good than harm. It cited false positives and overtreatment as concerns.⁸