Micronutrient, Vitamin B1 (Thiamine), Blood
Quest Diagnostics
Sample type: Whole blood
Requires fasting: Yes
Phlebotomy required
Details
Vitamin B1 is required for branched-chain amino acid and carbohydrate metabolism. Vitamin B1 deficiency is most often due to alcoholism or chronic illness. In the early stage, patients with vitamin B1 deficiency exhibit anorexia, irritability, apathy, and generalized weakness. Prolonged deficiency causes beriberi.
- Vitamin B1 (Thiamine), Blood
Estimated days for results: Results should be available in 2 - 5 business days after the sample is collected
- Loss of appetite
- Irritability and apathy
- General weakness
- Severe deficiency can lead to beriberi
What type of sample is required for this test?
3–5 business days
Reference range not available for individuals <18 years for this micronutrient test.
- Fasting before a blood draw means you don't eat or drink anything except water.
- Your doctor should provide any special instructions related to fasting for your test. Always follow your doctor's instructions.
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
- Preferred Specimen(s): 2 mL whole blood collected in an EDTA (lavender-top) tube - protected from light
- Alternative: NA
- Minimum Volume: 1 mL
- Collection Instructions: NA
- Transport Container: Amber transport tube
- Transport Temperature: Frozen
- Specimen Stability:
- Room temperature: 8 hours
- Refrigerated: 5 days
- Frozen: 35 days
- Reject Criteria:
- Received not protected from light
Minimum age:
18
State restrictions:
Patient can't order this test if they are located in Hawaii, Puerto Rico, New Jersey, New York, or Rhode Island
