This test is ideal if you're experiencing unexplained fatigue, weight changes, difficulty losing weight, mood swings, hair loss, or feeling cold all the time. It helps identify thyroid disorders and checks whether nutritional deficiencies in iron or vitamin D might be contributing to your symptoms. Many people use this test when they suspect their persistent tiredness and metabolic issues are related to thyroid function or nutrient deficiencies but want concrete answers.
How should I prepare for this test?
Fasting is preferred but not required for this test. If you're taking high-dose biotin supplements (more than 5 mg per day), you should wait at least eight hours after your last dose before having blood drawn, as biotin can interfere with test accuracy. Otherwise, you can take your regular medications and supplements as prescribed.
This comprehensive panel evaluates your complete thyroid function through TSH, Free T3, and Free T4 to identify causes of fatigue, weight changes, and temperature sensitivity. It checks for autoimmune thyroid conditions with antibody tests (TPO and Thyroglobulin), measures ferritin to assess iron stores that affect energy and hair health, and evaluates vitamin D levels which impact mood, bone health, and immune function. Together, these measurements provide a complete picture of thyroid health and the key nutrients that support it.
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 for vitamin D or iron deficiencies, and whether you should consider follow-up with an endocrinologist. You'll also get the standard lab report and can track your thyroid and nutrient levels over time using our trends feature to see how your interventions are working.
When will I get my results?
You can expect your results within approximately 5 business days after your blood is drawn. In some cases, if confirmation testing is needed for any of the markers, the turnaround time may be extended by a few additional days. You'll receive an email notification as soon as your results are ready to view.
Who should consider getting this test?
This test is ideal for people experiencing unexplained fatigue, weight gain or difficulty losing weight, mood changes, or feeling cold frequently. It's especially important for women with irregular periods, those with a family history of thyroid disease, anyone experiencing hair loss or dry skin, and people who suspect they have low iron or vitamin D. It's also valuable for those already being treated for thyroid conditions who want to monitor their levels alongside nutritional markers.
What symptoms indicate I may need this test?
Common symptoms include persistent fatigue even after adequate sleep, unexplained weight gain or difficulty losing weight despite diet and exercise, feeling cold when others are comfortable, and mood changes like depression or anxiety. You might also notice hair thinning or loss, dry skin, constipation, muscle weakness, brain fog, or irregular menstrual periods. These symptoms can overlap between thyroid dysfunction and vitamin D or iron deficiencies, which is why this comprehensive panel is so helpful.
How can I naturally support my thyroid function?
Supporting thyroid health starts with ensuring adequate iodine and selenium intake through foods like fish, eggs, Brazil nuts, and dairy products. Getting enough quality sleep (7-8 hours), managing stress through meditation or yoga, and exercising regularly can help balance thyroid hormones. Ensure adequate vitamin D through sunlight exposure and diet, and include iron-rich foods like lean meat, spinach, and lentils. Limiting processed foods, avoiding excessive soy products, and reducing exposure to environmental toxins may also help.
What is TSH and why does it matter?
TSH (Thyroid Stimulating Hormone) is produced by your pituitary gland and tells your thyroid how much hormone to make. It's the most important screening test for thyroid problems because it shows whether your thyroid is underactive or overactive. When TSH is high, it usually means your thyroid isn't making enough hormone (hypothyroidism), causing fatigue and weight gain. When TSH is low, your thyroid may be overactive (hyperthyroidism), causing anxiety and weight loss.
What does high TSH mean?
High TSH typically indicates hypothyroidism, meaning your thyroid gland isn't producing enough thyroid hormone, so your pituitary is working harder to stimulate it. This can cause fatigue, weight gain, feeling cold, constipation, dry skin, and depression. Causes include autoimmune conditions like Hashimoto's thyroiditis, iodine deficiency, or thyroid damage. Your doctor may recommend thyroid hormone replacement medication if levels are significantly elevated.
How often should I retest my thyroid levels?
If you're starting or adjusting thyroid medication, retest every 6-8 weeks until your levels stabilize in the optimal range. Once stable on medication, testing every 6-12 months is typically recommended for ongoing monitoring. If you're testing for the first time with normal results but persistent symptoms, consider retesting in 3-6 months. For monitoring vitamin D and ferritin alongside thyroid function, retesting every 3-6 months helps track your progress with supplementation or lifestyle changes.
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Only HSA & FSA is accepted.
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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.
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Demo results
TSH (Thyroid Stimulating Hormone)4.8 mIU/L
Demo results
LowOptimal 0.5 - 4.5High
4.8 mIU/L
What this means
Your TSH is slightly elevated, which may indicate your thyroid is working harder than ideal. This can contribute to fatigue, weight gain, difficulty losing weight, or feeling cold, and may benefit from closer monitoring and lifestyle adjustments.
Recommended actions
Ensure adequate iodine intake through seafood, dairy, or iodized salt
Consider selenium-rich foods like Brazil nuts, eggs, and fish
Manage stress through meditation, yoga, or regular relaxation practices
Retest in 8-12 weeks to monitor trends and track improvements
* 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.
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Thyroid Test for Fatigue, Weight Gain, and Low Energy
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