T3 Uptake
Quest Diagnostics
Sample type: Serum
Requires fasting: No
Phlebotomy required
Details
This test measures the availability of thyroid hormone binding sites, providing insights into thyroid health. It's important to interpret this test alongside thyroxine levels for a comprehensive understanding of thyroid function.
- T3, Uptake
Estimated days for results: Results should be available in 2 - 5 business days after the sample is collected
Details
T3 Uptake - This test measures the availability of thyroid hormone binding sites, providing insights into thyroid health. It's important to interpret this test alongside thyroxine levels for a comprehensive understanding of thyroid function.
What patients is this test right for?
This test may be ordered for individuals experiencing symptoms related to thyroid imbalances or to monitor the effectiveness of thyroid treatments.
Decreased T3 Uptake can be seen in:
- Pregnancy
- High estrogen levels
- High protein levels in the blood
- Acute intermittent porphyria
Increased T3 Uptake can occur with:
- High androgen levels
- Stress
- Acute liver disease
What type of sample is required for this test?
1 mL serum. Phlebotomy is required.
3–5 business days
22-35 %
Blood Draw Options with Fullscript
Fullscript offers several convenient phlebotomy options to complete your lab testing:
Quest Diagnostics Patient Service Centers (PSC)
- Location: Visit a nearby Quest Diagnostics Patient Service Center.
- Cost: $10 sample collection fee (paid during lab order checkout).
- Scheduling: Schedule your appointment here. Appointments are recommended to reduce wait times. Walk-ins are accepted, but may experience delays. Aim to arrive 10 minutes before your appointment.
- Collection Instructions:
- Bring a valid ID.
- Bring your digital or printed requisition form, available in the Labs tab of your Fullscript account.
- Check-in: Scan the QR code from your confirmation email or follow kiosk instructions.
- More Info: Quest Diagnostics blood draw guide
Getlabs Mobile Phlebotomy
- Location: Sample collection at your home or office.
- Cost: $85 sample collection fee (paid during lab order checkout).
- Availability: Available in most locations – enter your ZIP code during checkout to confirm.
- Scheduling: Schedule your appointment here through your Fullscript account.
- Collection Instructions:
- Have your digital or printed requisition form and valid ID ready.
- Your phlebotomist will contact you by phone to coordinate arrival.
- More Info: Getlabs blood draw guide
Specimen
- Preferred Specimen(s): 1 mL serum
- Alternative: NA
- Minimum Volume: 0.5 mL
- Collection Instructions: NA
Storage and shipping instructions
- Transport Container: Serum separator tube (SST)
- Transport Temperature: Room Temperature
- Specimen Stability:
- Room temperature: 7 days
- Refrigerated: 10 days
- Frozen: 28 days
- Reject Criteria: NA
State restrictions:
Patient can't order this test if they are located in Hawaii, Puerto Rico, New Jersey, New York, or Rhode Island
