T4, Total Blood Test

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Feature	Labcorp	Quest Diagnostics
Price	$7.99	Coming soon
Results in	~2 business days	—
Sample type	Blood Serum	—
Require fasting	No	—

About the test

T4, Total measures the overall amount of thyroxine in the blood, including both bound and unbound forms. It is used to assess thyroid function and can help diagnose conditions such as hypothyroidism or hyperthyroidism.

Included biomarkers & Reference ranges

Biomarker	Reference range
T4, Total Measures total thyroxine (T4), including both bound and unbound hormone, used in thyroid function evaluation.	4.5–12 µg/dL

Reference ranges vary by lab, age, and sex (M/F). Your report shows your exact range. Click any biomarker to see its optimal range and what your results mean.

How it works

1. Order online No referral or insurance
2. Get a requisition By email in 24–72 hours
3. Visit a draw center Bring a matching photo ID
4. Get results Securely by email

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Consultations

Not sure how to read your results? We can help.

Schedule a consultation with a Hormunity specialist. We’ll walk through every marker, interpret what it means for you, and map out the next steps for your care.

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