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Comprehensive thyroid test for people with fatigue, weight changes, and mood issues

Thyroid Test for Weight Gain, Fatigue & Mood Changes

Thyroid Starter

  • Diagnose thyroid problems with precision
  • Pinpoint the cause of chronic fatigue
  • Expose the reasons behind your weight gain
First results as soon as overnight*

90 day happiness guarantee

We stand behind our service

Prescription & fees included

Go directly to the lab, no extra fees

Easy to understand results

With friendly doctor's notes & guidance

Fast & convenient

Lab visit as quick as 10 mins in & out

90 day happiness guarantee

We stand behind our service

Prescription & fees included

Go directly to the lab, no extra fees

Easy to understand results

With friendly doctor's notes & guidance

Fast & convenient

Lab visit as quick as 10 mins in & out

What's this test for?

This test is ideal if you're experiencing unexplained fatigue, weight changes that won't budge, mood swings, feeling too hot or cold, hair loss, or brain fog. It helps identify thyroid disorders and autoimmune thyroid conditions that may be affecting your energy, metabolism, and overall well-being. Many people use this test when they suspect their symptoms are hormone-related but want concrete answers about what's really going on with their thyroid.

How should I prepare for this test?

You are not required to fast for this test, so you can eat and drink normally beforehand. However, samples should not be collected during or soon after heparin administration if you're receiving that medication. Results typically take about 8 business days, though if confirmation testing is needed, it may take a bit longer.

What's included in this test?

TSI T3, Free T4, Free, Direct Dialysis T3, Total TSH T3 Reverse, LC/MS/Ms

This comprehensive thyroid panel measures TSH, Free T3, Total T3, Free T4, Reverse T3, Thyroid Peroxidase Antibodies (TPO), Thyroglobulin Antibodies, and Thyroid-Stimulating Immunoglobulin (TSI). This complete panel evaluates how well your thyroid is producing and converting hormones, which directly impacts your energy, weight, mood, and body temperature regulation. It also checks for autoimmune thyroid conditions like Hashimoto's or Graves' disease by measuring antibodies that can attack your thyroid. Together, these measurements provide a complete picture of your thyroid function and help identify the root cause of thyroid-related symptoms.

What happens after I get my results?
You'll receive detailed doctor notes in simple language explaining what your thyroid levels mean for your energy, metabolism, and overall health. These notes include personalized recommendations like dietary changes, supplement suggestions, stress management tips, or whether you should follow up with an endocrinologist. You'll also get the standard lab report and can track your thyroid levels over time using our trends feature to see how your lifestyle changes or medications are working.
When will I get my results?
You can expect your results in approximately 8 business days after your sample is collected. In some cases, if confirmation testing is required for accuracy, the turnaround time may be extended slightly. You'll be notified as soon as your results are available and ready to review.
Who should consider getting this test?
This test is perfect for anyone experiencing unexplained fatigue, sudden weight changes, mood swings, temperature sensitivity, hair thinning, or irregular periods. It's especially important for women over 35, people with a family history of thyroid disease, anyone already being treated for thyroid conditions who needs comprehensive monitoring, or those who've had basic thyroid tests but still have symptoms.
What symptoms indicate I may need this test?
Common symptoms include persistent tiredness even after sleep, unexpected weight gain or difficulty losing weight, feeling unusually cold or hot, thinning hair or hair loss, dry skin, constipation, depression or anxiety, brain fog or trouble concentrating, and irregular or heavy menstrual periods. If you're experiencing several of these symptoms together, a thyroid issue could be the underlying cause.
How can I naturally support my thyroid function?
Supporting thyroid health starts with ensuring adequate iodine and selenium intake through foods like fish, seafood, eggs, Brazil nuts, and dairy products. Getting 7-8 hours of quality sleep, managing stress through meditation or yoga, and regular exercise can help balance thyroid hormones. Reducing processed foods, limiting goitrogens like raw cruciferous vegetables if you have thyroid issues, and avoiding excessive soy products may also help optimize thyroid function.
What is TSH and why does it matter?
TSH (Thyroid Stimulating Hormone) is produced by your pituitary gland and tells your thyroid how much thyroid hormone to make. When TSH is high, it means your thyroid isn't producing enough hormone and your body is trying to stimulate it to work harder. When TSH is low, it often means your thyroid is overactive. TSH is typically the first marker doctors check because it's very sensitive to thyroid function changes.
What does high Reverse T3 mean?
High Reverse T3 can indicate your body is converting active thyroid hormone (T3) into an inactive form, which can happen during periods of chronic stress, illness, or severe calorie restriction. This can leave you feeling fatigued and experiencing hypothyroid symptoms even when your other thyroid numbers look normal. It's often a sign that your body is trying to conserve energy during times of stress.
How often should I retest my thyroid levels?
If you're starting or adjusting thyroid medication, your doctor will typically want to retest every 6-8 weeks until your levels stabilize. Once your thyroid function is stable, retesting every 6-12 months is common for ongoing monitoring. If you're testing for symptoms and results are borderline or you're making lifestyle changes, retesting in 3-6 months helps track whether your interventions are working.
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 support@privatemdlabs.com 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 support@privatemdlabs.com, 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 support@privatemdlabs.com. 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 support@privatemdlabs.com.
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 support@privatemdlabs.com.

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 support@privatemdlabs.com 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.*
We don’t sell or share your data. Your time & privacy matter.
US-licensed doctors have your back if things get unclear.
No hidden fees, nice discounts for regular checkups.
Save a trip to the doctor, go directly to the lab
Instant orders, results often overnight*
Results explained in simple language
Reviewed by US licensed doctors
Fast & confidential, we never sell or share your data
No insurance needed, transparent pricing
Demo results
TSH (Thyroid Stimulating Hormone) 4.8 mIU/L
Demo results
Low Optimal 0.5 - 4.5 High
4.8 mIU/L

What this means

Your TSH is slightly elevated, which may indicate your thyroid is working harder than ideal to produce enough thyroid hormone. This can contribute to symptoms like fatigue, weight gain, feeling cold, or difficulty concentrating, and may benefit from closer monitoring and lifestyle adjustments.

* Regular blood test results (e.g., CBC) typically start arriving the next business day after sample collection. More complex tests, such as hormone panels, may take up to 10–15 business days due to their complexity.
Here’s how easy it is to get blood work done on your terms
Choose a checkup
Order your test Save a trip to the doctor. Your results will come with clear, friendly explanations. Takes 2 minutes
Book a lab
Book an appointment Visit any of our 4,000 nearby lab locations to have your samples collected. Book or walk-in
Choose a checkup
Get results Receive a clear, easy-to-digest health report by email & SMS within a few business days. Get answers, fast

Thyroid Test for Weight Gain, Fatigue & Mood Changes

  • Diagnose thyroid problems with precision
  • Pinpoint the cause of chronic fatigue
  • Expose the reasons behind your weight gain
Still got questions? Text our super-cool support team at 754-799-7833 to get help finding your ideal checkup.

Ask Me Anything

Your 24/7 Personal Lab Guide

Quick questions:

What does this test measure?
Do I need to fast for this test?
When will I get my results?
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We provide helpful guidance, not medical diagnoses. For medical decisions, consult a licensed professional.