What's this test for?

This test is ideal if you're experiencing unexplained fatigue, weakness, irritability, or a general lack of energy that won't go away. It helps identify if your body has enough Vitamin B1 (thiamine), which is essential for converting food into energy and supporting nerve function. People with chronic illness, those who consume alcohol regularly, or anyone following restrictive diets often use this test to uncover hidden nutritional imbalances affecting their daily vitality.

What happens after I get my results?

You'll receive detailed doctor notes in simple language explaining what your Vitamin B1 levels mean for your energy, metabolism, and overall health. These notes include personalized recommendations like dietary changes, supplement suggestions, or whether you should consider further nutritional assessment. You'll also get the standard lab report and can track your vitamin levels over time using our trends feature to see how dietary interventions or supplementation are working.

What's included in this test?

This test measures Vitamin B1 (Thiamine), Blood, LC/MS/MS. This test measures Vitamin B1 (Thiamine) using advanced LC/MS/MS technology, which provides highly accurate results. Vitamin B1 is crucial for energy production from carbohydrates and for proper nerve and muscle function. Low levels can explain persistent fatigue, weakness, irritability, and poor appetite, while adequate levels support optimal energy metabolism and nervous system health.

How should I prepare for this test?

Overnight fasting is required for this test to ensure accurate results. This means no food or drinks except water for at least 8 hours before your blood draw. You can take your regular medications unless instructed otherwise by your healthcare provider.

When will I get my results?

You can expect to receive your results within 5 business days after your blood sample reaches the lab. You'll be notified via email as soon as your results are ready to view in your secure online account.

Who should consider getting this test?

This test is especially important for people who regularly consume alcohol, have chronic digestive issues, or follow restrictive diets that may limit nutrient intake. It's also valuable for those experiencing persistent fatigue, weakness, or neurological symptoms like tingling or numbness. Anyone with chronic illness, malabsorption conditions, or those recovering from surgery may benefit from checking their Vitamin B1 status.

What symptoms indicate I may need this test?

Common signs of Vitamin B1 deficiency include persistent fatigue that doesn't improve with rest, generalized weakness, loss of appetite, and irritability or mood changes. Early symptoms might also include difficulty concentrating, apathy, or feeling mentally foggy. If left unchecked, more serious symptoms can develop, so testing early is important if you're experiencing these issues.

How can I naturally support my Vitamin B1 levels?

Eating a balanced diet rich in whole grains, legumes, nuts, seeds, and pork can help maintain healthy B1 levels. Fortified cereals and breads are also good sources. Reducing alcohol consumption is crucial, as alcohol interferes with B1 absorption and storage. Cooking methods matter too—steaming or microwaving preserves more thiamine than boiling, since B1 is water-soluble and can leach into cooking water.

What is Vitamin B1 and why does it matter?

Vitamin B1, also called thiamine, is a water-soluble vitamin that your body needs to convert carbohydrates into energy. It's essential for proper nerve function, muscle contraction, and heart health. Since your body can't produce or store large amounts of B1, you need a regular dietary supply. Without adequate B1, your cells can't efficiently produce energy, leading to fatigue and other health issues.

What does low Vitamin B1 mean?

Low Vitamin B1 levels indicate your body isn't getting enough thiamine to support optimal energy production and nerve function. This can result from poor dietary intake, excessive alcohol consumption, chronic illness, or malabsorption issues. Mild deficiency causes fatigue, irritability, and weakness, while severe or prolonged deficiency can lead to more serious conditions like beriberi or neurological complications.

How often should I retest my Vitamin B1 levels?

If your initial test shows deficiency and you start supplementation or dietary changes, retesting in 8-12 weeks can help confirm your levels are improving. Once your levels are in the optimal range, annual testing is typically sufficient unless you have ongoing risk factors like alcohol consumption or chronic illness. Your healthcare provider may recommend more frequent monitoring based on your individual situation.

Getting your blood test with us is easy, private & backed by the power of science.Long story short: In the test options, use the filters or search box to narrow your choices and find the test you want. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy! If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

How do I know which test to get?

In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option. Just text or call us at 754-799-7833, email us at support@privatemdlabs.com, and we'll gladly help you. We've got your back and reply quickly.

When will my lab results be available?

Most test results will be available within 1–3 business days. Once they're ready, we'll send an email and text message to let you know. After your blood draw, just hang tight and don't worry – we'll keep you updated and in the loop! If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com, and we'll gladly help you.

Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?

Absolutely! We totally understand that errors can happen. No worries, we're here to help you. Just reach out to us via text at 754-799-7833 or shoot us an email at support@privatemdlabs.com. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you. There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out. Our lab requires an address to be listed to generate an order.

Do you accept health insurance?

Only HSA & FSA is accepted. Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts. This policy applies to all insurance companies, including federal health insurance programs like Medicare. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com.

Can I cancel my order?

Yes. We get it – sometimes your needs change. As long as your samples haven’t been collected yet, we’re happy to help you cancel your order. If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com. You can read more about our cancellation policy here.

How can I find a lab location near me?

During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! 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. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

Vitamin B1 Test - Fatigue & Energy Check

Getting your blood test with us is easy, private & backed by the power of science.

Long story short:

In the test options, use the filters or search box to narrow your choices and find the test you want.
If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!

754-799-7833

[email protected]

Blood Test for Fatigue and Low Energy Levels

Vitamin B1 (Thiamine) LC/MS/MS

90 day happiness guarantee

Prescription & fees included

Easy to understand results

Fast & convenient

90 day happiness guarantee

Prescription & fees included

Easy to understand results

Fast & convenient

What's this test for?

How should I prepare for this test?

What's included in this test?

Here’s why 1,000,000+ customers chose us for affordable hassle-free private blood testing.

Blood Test for Fatigue and Low Energy Levels

90 day happiness guarantee

Prescription & fees included

Easy to understand results

Fast & convenient

1,000,000+ blood tests later, here's what our customers say