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TSH thyroid test for fatigue, weight changes, and mood symptoms

TSH Thyroid Blood Test with Free T4 Reflex

TSH with Reflex to Free T4

  • Screen for underactive thyroid symptoms
  • Check unexplained fatigue and weight changes
  • Monitor thyroid hormone balance over time
$49
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First results as soon as overnight*

All results normal? Get your money back. First-time customers only. File a support ticket titled “Money Back Guarantee” with your order number within 15 days of receiving your results. STD, Sickle Cell, and gift orders aren’t eligible. Full terms apply. guarantee
No questions asked refunds
LegitScript certified

Prescription & all lab fees included

Go directly to the lab, no extra fees

Doctor's guidance included

Easy to understand results

Fast & convenient

Lab visit as quick as 10 mins in & out

  • Many results come back overnight *
  • 90-day money back guarantee
  • Save time & skip the doctor’s office
  • Lab visit as quick as 10 minutes
  • Results explained, with clear next steps
  • LegitScript certified
  • No questions asked refunds
  • The price you see is the price you pay

Prescription & all lab fees included

Go directly to the lab, no extra fees

Doctor's guidance included

Easy to understand results

Fast & convenient

Lab visit as quick as 10 mins in & out

All results normal? Get your money back. First-time customers only. File a support ticket titled “Money Back Guarantee” with your order number within 15 days of receiving your results. STD, Sickle Cell, and gift orders aren’t eligible. Full terms apply. guarantee
No questions asked refunds
LegitScript certified

What's this test for?

This test is ideal if you're experiencing unexplained fatigue, weight changes, hair loss, feeling too cold or too hot, or mood swings that could point to a thyroid problem. It's often the first test used to check whether your thyroid gland is working too slowly (hypothyroidism) or too fast (hyperthyroidism). If your initial result is abnormal, the lab automatically runs a follow-up Free T4 test on the same sample so you get more complete information without another draw.

What's included in this test?

This test measures thyroid stimulating hormone (TSH), the signal your brain sends to tell your thyroid how much hormone to make. If that result comes back abnormal, the lab automatically adds a Free T4 measurement to the same sample, which shows how much active thyroid hormone is actually circulating, helping paint a fuller picture without ordering a second test.

What happens after I get my results?

Your results show up in your account with your TSH number and, if triggered, your Free T4 number, each with the normal range explained so you know exactly where you stand. If your TSH is out of range, simple next steps include rechecking your sleep, stress, and diet habits, and retesting in a few months to see the trend, or seeking care sooner if you have severe symptoms like a racing heart or extreme fatigue. You can download a standard lab report from your account any time, and the trends feature lets you track your TSH over multiple tests to see if it's moving in the right direction.

How often should I retest?
If your first TSH result is normal and you have no symptoms, retesting every 1-2 years is generally enough. If you had an abnormal result or started a new treatment or lifestyle change affecting your thyroid, retesting every 6-8 weeks helps you see if things are trending toward normal. People with a family history of thyroid disease or ongoing symptoms may want to check more often.
When will I get my results?
Results are typically ready within about 7 days of your blood draw. You'll be notified as soon as they're posted to your account, and if your TSH is abnormal, the reflex Free T4 result will be included in the same report rather than requiring a separate visit.
Who should consider this test?
This test is a good fit for anyone noticing unexplained weight changes, fatigue, hair thinning, feeling unusually cold or hot, or changes in heart rate or mood. It's also useful for people with a family history of thyroid disease or those who simply want a baseline check of their thyroid health. Women, who are more commonly affected by thyroid issues, and anyone over 35 may especially benefit from periodic screening.
What symptoms indicate I may need this test?
Common signs include ongoing tiredness, unexplained weight gain or loss, feeling cold or overheated more than usual, dry skin, hair loss, constipation or diarrhea, irregular heartbeat, and mood changes like anxiety or low mood. Women may also notice changes in their menstrual cycle. If several of these symptoms sound familiar, a TSH test is a reasonable first step.
What does high TSH mean?
A high TSH usually means your thyroid isn't making enough hormone, so your brain is sending stronger signals to try to wake it up — this is called hypothyroidism. It can cause fatigue, weight gain, dry skin, and feeling cold. Simple steps include making sure you're getting enough iodine and selenium in your diet, managing stress, prioritizing sleep, and retesting to confirm the pattern before making bigger changes.
What does low TSH mean?
A low TSH often means your thyroid is producing too much hormone, a condition called hyperthyroidism, which can cause a racing heart, anxiety, weight loss, or trouble sleeping. It can also happen if you're taking too much thyroid medication. If you notice a fast heartbeat, tremors, or significant weight loss, it's worth seeking care sooner rather than waiting, since untreated hyperthyroidism can affect your heart over time.
How can I naturally support healthy thyroid function?
Eating enough iodine-rich foods like seafood and dairy, along with selenium sources like Brazil nuts, supports normal thyroid hormone production. Managing stress, getting consistent quality sleep, and avoiding extreme calorie restriction can also help keep your thyroid signals balanced. Regular, moderate exercise and limiting excess soy or raw cruciferous vegetables (which can interfere with thyroid function in large amounts) are additional simple habits worth considering.
How’s this work?
Getting your blood test with us is easy, private & backed by the power of science.

Long story short:
  1. In the test options, use the filters or search box to narrow your choices and find the test you want.
  2. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
  3. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
  4. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
  5. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
  6. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
  7. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!
  8. If you have any questions, please text us at 754-799-7833 or email [email protected] and we'll gladly help you.
How do I know which test to get?
In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option.

Just text or call us at 754-799-7833, email us at [email protected], and we'll gladly help you. We've got your back and reply quickly.
Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?
Absolutely! We totally understand that errors can happen. No worries, we're here to help you.

Just reach out to us via text at 754-799-7833 or shoot us an email at [email protected]. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you.

There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out.

Our lab requires an address to be listed to generate an order.
Do you accept health insurance?
Only HSA & FSA is accepted.

Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts.

This policy applies to all insurance companies, including federal health insurance programs like Medicare.

If you have any questions, please text us at 754-799-7833 or email [email protected].
Can I cancel my order?
Yes.

We get it – sometimes your needs change.

As long as your samples haven’t been collected yet, we’re happy to help you cancel your order.

If you have any further questions, please text us at 754-799-7833 or email [email protected].

You can read more about our cancellation policy here.
How can I find a lab location near me?
During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp).

Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym.

If you have any questions, please text us at 754-799-7833 or email [email protected] and we'll gladly help you.

Here’s why 1,000,000+ customers chose us for affordable hassle-free private blood testing.

You get clinical lab reports & simplified health insights.
Save time & gas, go straight to the lab. Our doctors cover the rest.
Results start landing the next day after your lab visit.*
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Save a trip to the doctor, go directly to the lab
Get lab order in minutes, results come overnight*
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Fast & confidential, we never sell or share your data
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Demo results
Thyroid Stimulating Hormone (TSH) 5.8 mIU/L
Demo results
Low (<0.4) Optimal (0.4-4.0) High (>4.0)
5.8 mIU/L

What this means

A TSH of 5.8 mIU/L is above the typical optimal range, suggesting your thyroid may be underactive. This pattern, called hypothyroidism, can cause fatigue, weight gain, and feeling cold, and often triggers an automatic Free T4 test to confirm the diagnosis.

* Regular blood test results (e.g., CBC) typically start arriving the next business day after sample collection. More advanced tests may take longer due to complexity.
Here’s how easy it is to get blood work done on your terms
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Get results Receive a clear, easy-to-digest health report by email & SMS within a few business days. Get answers, fast

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TSH Thyroid Blood Test with Free T4 Reflex

  • Screen for underactive thyroid symptoms
  • Check unexplained fatigue and weight changes
  • Monitor thyroid hormone balance over time
$49
Still got questions? Text our super-cool support team at 754-799-7833 to get help finding your ideal checkup.
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For informational purposes only. Not medical advice.