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Triiodothyronine (T3), Total Blood Test from Mito Health

Labbrary Test GradeUseful
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Not calculated

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Labbrary's review, Fit Score, and basic comparison are free. The provider's panel, shipping, collection, clinician review, and other services are separate. About 2 minutes. No account required.

Measures total T3 for clinician-guided investigation of an overactive thyroid, including cases with normal T4. Order online for a partner-lab blood draw; no fasting is required.

Current price
$8.07 from $17.57 with fees
Sample
Blood
Turnaround
1 days
Access
Lab Visit, Order Online
Evidence & Key Facts
Source collectedLast source check August 30, 2026

Evidence basis. This named result reflects the sources and verification evidence listed on this page as of the date shown.

Best for

Thyroid

Standout strength

Online ordering includes the required laboratory order through Mito.

Important watch-out

Labcorp and Quest are offered in 47 states and Washington, DC; BioReference is offered in NJ, NY and RI. Laboratory selection and price depend on your state.

Triiodothyronine (T3), Total Blood Test from Mito Health
Labbrary Test GradeUseful
Your Fit Score
Not calculated

Answer five questions to see how this panel matches your goals, budget, collection preferences, access, and support needs.

Calculate my fit

Labbrary's review, Fit Score, and basic comparison are free. The provider's panel, shipping, collection, clinician review, and other services are separate. About 2 minutes. No account required.

Measures total T3 for clinician-guided investigation of an overactive thyroid, including cases with normal T4. Order online for a partner-lab blood draw; no fasting is required.

Current price
$8.07 from $17.57 with fees
Sample
Blood
Turnaround
1 days
Access
Lab Visit, Order Online
Evidence & Key Facts
Source collectedLast source check August 30, 2026

Evidence basis. This named result reflects the sources and verification evidence listed on this page as of the date shown.

Best for

Thyroid

Standout strength

Online ordering includes the required laboratory order through Mito.

Important watch-out

Labcorp and Quest are offered in 47 states and Washington, DC; BioReference is offered in NJ, NY and RI. Laboratory selection and price depend on your state.

Labbrary+

The Test Grade. The Reason Behind It.

Potentially useful for the right buyer, with meaningful evidence, coverage, transparency, access, cost, terms, or privacy tradeoffs to review.

A lower grade does not mean a panel is a bad personal fit. Your Fit Score can be higher when its purpose, price, sample, access, or support matches what you need.

Explore the Full Methodology
Labbrary Test GradeUseful

Next step

Check the panel or research the provider

Prices, availability, and ordering requirements can change. Confirm the current details before purchasing.

View Exact Panel on Provider SiteView Mito Health profile

Scope, both directions

Inside the Panel. Beyond the Name.

Named measurements

  • Total T3

Measured categories and focus areas

  • Thyroid

Important limits and omissions

  • Exact order or draw fees and order-specific refund terms remain unconfirmed.
  • Exact analytical method, performing laboratory and offer-specific validation remain unconfirmed.
  • Exact specimen retention and sharing terms remain unconfirmed under the provider privacy policy.

No broader panel in the Labbrary catalog lists every biomarker on this one for a lower listed price.

Counted among one-time lab-draw listings with a published price, matched by published biomarker names. That doesn’t mean the tests are equivalent. Updated October 2, 2026.

The full breakdown

Eight Dimensions.
One Named Result.

Open any row for the reasoning and evidence behind the named result.

Measurement quality is partial: exact offer names laboratory system(s) Labcorp; Quest Diagnostics and states collection at a CLIA/CAP-accredited lab. Seller Mito Health, collection route, and ordering clinician are separated above. A laboratory system name does not identify the exact performing facility, the assay method, or offer-specific analytical performance. Limitation: Measurement quality is partial: exact offer names laboratory system(s) Labcorp; Quest Diagnostics and states collection at a CLIA/CAP-accredited lab. Seller Mito Health, collection route, and ordering clinician are separated above. A laboratory system name does not identify the exact performing facility, the assay method, or offer-specific analytical performance. No score or grade assigned.

Symptoms of an overactive thyroid (weight loss, palpitations, tremor, heat intolerance) with a normal or borderline T4 Working up unexplained fatigue and weight loss, or proximal muscle weakness Following a known thyroid nodule or Graves' disease over time Confirming T3 thyrotoxicosis suspected from a low TSH. Limitation: No additional limitation was recorded in the authority row.

Measures: Mass concentration What you'll learn Insights that connect the dots. Limitation: Complete named list not re-verified against the current page in this pass.

Reviewed by a real clinician. Results arrive in your dashboard. Limitation: No additional limitation was recorded in the authority row.

$5.76 Member price | $8.07 Non-member. Limitation: Draw/order fees and order-specific exceptions may apply; confirm before payment.

Find labs near you; lab-drawn collection. Limitation: Local booking availability requires confirmation.

Cash price $8.07 non-member / $5.76 member. HSA/FSA eligible. Limitation: Exact-offer refund terms not stated on the product page; shared Terms of Service govern refunds and credits.

Mito Health Privacy Policy governs data handling: https://mitohealth.com/privacy. Limitation: Exact-offer data retention and sharing terms not stated on the product page.

What it asks of you

Sample and fulfillment journey

Order

Confirmed

Choose this test, your state and an available laboratory online. Mito provides the laboratory order when required.

Panel-specific source · Source dated September 10, 2026

Collect

Confirmed

Visit the available laboratory selected at checkout for a blood draw. Quest859 requires 1 mL serum, minimum 0.3 mL, in a serum separator tube, transported at room temperature; stability is seven days at room temperature or refrigerated and 28 days frozen. Labcorp002188 accepts serum, preferred, or lithium-heparin plasma: 1 mL, minimum 0.7 mL, with red-top, gel-barrier or green-top lithium-heparin tubes. Transfer separated red-top serum or plasma into a plastic transport tube. Do not use oxalate, EDTA or citrate plasma. Store at room temperature; listed stability is 14 days at room temperature, refrigerated or frozen. Improper labeling and citrate plasma are rejected. BioReference0150-3 is the NJ, NY and RI option; its detailed volume, tube and handling requirements have not been independently verified. Follow that collection site's instructions rather than applying another laboratory's handling rules. This is not a home kit or challenge protocol. No fasting is required. Tell your clinician and collection site about biotin supplements and thyroid medicines, including dose and last dose time. Mito suggests about 48 hours without high-dose biotin; Labcorp specifies at least 72 hours. Confirm the interval for your selected laboratory before collection. Do not stop prescribed medicines without clinician advice.

Panel-specific source · Source dated September 10, 2026

Report

Confirmed

Results appear in the Mito dashboard after laboratory processing. A personalized action plan requires membership; live consultations cost extra.

Panel-specific source · Source dated September 10, 2026

Under the hood

Follow the Evidence.

Every published claim should trace to a dated source. Missing evidence remains visible instead of being filled with assumptions.

Source 1Recorded for this record. Last source check August 30, 2026.View source

True total cost

The Price. Plus the Details.

Pricing for Triiodothyronine (T3), Total Blood Test
ItemCurrent disclosed priceNote
Panel$8.07Verify the checkout total, shipping, and collection fees before ordering.
Lab draw fee+ $9.50 to $15Per lab visit, added at checkout. One applies, depending on the lab you use: BioReference $9.50, Labcorp $11.50, Quest $15. Checked September 29, 2026. Source
Total at checkoutFrom $17.57Listed price plus the required fees above, before tax and any optional services.
HSA/FSA paymentConditional eligibilityThis test is marked HSA/FSA eligible. Your plan determines individual eligibility and reimbursement.
Optional servicesAt-home phlebotomist, $99Only if you choose it. Not included in the total. Checked September 29, 2026. Source

Price status. This record shows disclosed pricing. Checkout costs can change and should be verified before purchase.

Your data

Your Data. Your Questions.

Privacy details are scored only when source documentation is available. Unconfirmed retention, deletion, research use, or marketing practices remain unconfirmed.

Reading the labels

What Has Been Checked?

Source collected

Evidence labels stay separate from the Test Grade. They show how much source support exists for the evaluation.

The balance

The Strengths. The Tradeoffs.

Strengths

  • Online ordering includes the required laboratory order through Mito.
  • Measures total triiodothyronine (T3), including its protein-bound and free fractions together. This is one hormone measurement, not free T3, reverse T3 or T3 uptake. TSH, T4 and thyroid antibodies are not included.
  • Results are delivered to the Mito dashboard after laboratory processing.

Watch-outs

  • Labcorp and Quest are offered in 47 states and Washington, DC; BioReference is offered in NJ, NY and RI. Laboratory selection and price depend on your state.
  • The starting test price of $8.07 is the Quest Diagnostics nonmember option outside NJ, NY and RI, before its separate order fee. Other laboratory options have different prices and fees.
  • Quest Diagnostics test 859, for 47 states and Washington, DC, excluding NJ, NY and RI: $8.07 without membership or $5.76 with optional $9 monthly membership, plus a separate $15.00 order fee.
  • BioReference test 0150-3, for NJ, NY and RI: $10.59 without membership or $7.56 with optional $9 monthly membership, plus a separate $9.50 order fee.
  • Labcorp test 002188, for 47 states and Washington, DC, excluding NJ, NY and RI: $16.10 without membership or $11.50 with optional $9 monthly membership, plus a separate $11.50 order fee.
  • Membership is optional. The final checkout total, cancellation and refund terms remain unverified.
  • Typical results take about 1 day; this is not a guaranteed order-to-result deadline.
  • Total T3 can change with binding proteins, pregnancy, estrogen use, nutrition and nonthyroidal illness. It is not a standalone diagnosis or a reliable test for ruling out hypothyroidism. Interpret it with TSH, other thyroid tests and clinical history.
  • No fasting is required. Tell your clinician and collection site about biotin supplements and thyroid medicines, including dose and last dose time. Mito suggests about 48 hours without high-dose biotin; Labcorp specifies at least 72 hours. Confirm the interval for your selected laboratory before collection. Do not stop prescribed medicines without clinician advice.
  • Results appear in the Mito dashboard after laboratory processing. A personalized action plan requires membership; live consultations cost extra.
  • This test is marked HSA/FSA eligible. Your plan determines individual eligibility and reimbursement.

Take it with you

The Test Truth Card

The key facts from this review in one compact card.

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Verification History

August 30, 2026Recorded source date.Source collected

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