What's this test for?

This test is ideal if you're experiencing ongoing tiredness, muscle weakness, irritability, or loss of appetite that doesn't have a clear cause. It's also useful if you drink alcohol regularly, have a chronic illness, or follow a restrictive diet, since these can lower your vitamin B1 levels. Checking your thiamine level can help explain these symptoms and guide simple next steps.

What happens after I get my results?

Your results show up in your account with your Vitamin B1 level and an explanation of what the normal range means. If your level is low, the report will point you toward simple next steps like adding thiamine-rich foods or a supplement, and retesting after a few months to see if it improved. If your level is dangerously low, the report will advise seeking medical care right away. You can also download a standard lab report and track your Vitamin B1 level over time using the trends feature.

Who should consider this test?

People who drink alcohol frequently, have a chronic illness, follow a very limited diet, or have had weight-loss surgery are more likely to run low on vitamin B1 and should consider checking it. It's also worth testing if you have unexplained fatigue, weakness, or nerve tingling that hasn't improved with other changes. Older adults and people with digestive conditions that affect nutrient absorption may also benefit.

What symptoms indicate I may need this test?

Early signs of low vitamin B1 include feeling unusually tired, losing your appetite, feeling irritable, and general muscle weakness. As it gets worse, people can develop tingling or numbness in the hands and feet, confusion, or an irregular heartbeat. If you notice several of these symptoms together, especially alongside heavy alcohol use or poor diet, it's a good reason to check your level.

How can I naturally support healthy thiamine levels?

You can boost your vitamin B1 naturally by eating more whole grains, pork, legumes, seeds, and nuts, since these are some of the richest natural sources. Cutting back on alcohol helps too, because alcohol interferes with how your body absorbs and stores thiamine. Cooking vegetables lightly instead of overcooking them also helps preserve the vitamin. If your diet is very limited, a basic B-complex supplement can help fill the gap.

When will I get my results?

Results are typically ready within about 7 days of your blood draw. Once ready, they'll be posted directly to your online account, where you can view your Vitamin B1 level and what it means.

What does low Vitamin B1 mean?

A low result means your body doesn't have enough thiamine to properly support your nerves, muscles, and energy production. This can show up as fatigue, weakness, irritability, or in more serious long-term cases, a condition called beriberi that affects the heart and nerves. Adding thiamine-rich foods, cutting back on alcohol, and retesting in a few months are good first steps, but very low results paired with severe symptoms should prompt seeking medical care right away.

What causes low Vitamin B1 levels?

The most common causes are heavy or long-term alcohol use, since alcohol blocks thiamine absorption, and poor diet that lacks whole grains, meat, or legumes. Chronic illnesses, digestive disorders that affect nutrient absorption, and weight-loss surgery can also lead to low levels. Increased needs during pregnancy or periods of illness can sometimes outpace intake as well.

How often should I retest?

If your level comes back low and you make dietary changes or start a supplement, retesting after about 8-12 weeks is a reasonable way to see if your level has improved. If your first result is in the normal range and you don't have ongoing risk factors like alcohol use or a restrictive diet, yearly testing is usually enough. Anyone with a chronic condition affecting nutrient absorption may want to test more often.

What should I do if my results are abnormal?

If your Vitamin B1 comes back low, start by adding thiamine-rich foods like whole grains, pork, and legumes to your meals, and cut back on alcohol if that applies to you. A basic B-complex or thiamine supplement can help raise your level between meals. Retest in a couple of months to check your progress, and if you have severe symptoms like confusion, an irregular heartbeat, or significant weakness, seek medical care promptly.

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 Thiamine Test - Deficiency & 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

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