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Vitamin B1 (Thiamine)

Insights Insights

Your vitamin B1 levels are normal, which is great news. Adequate intake of vitamin B1 is important for your overall health and well-being. It's recommended that you continue to consume foods high in vitamin B1, such as whole grains, pork, and beans, to maintain your levels.
Vitamin B1 (Thiamine), Blood, LC/MS/MS
good
Low Desirable 78 – 185 High
110 nmol/L

Note: (Note) Vitamin supplementation within 24 hours prior to blood draw may affect the accuracy of the results. This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes. MDF med fusion 2501 South State Highway 121,Suite 1100 Lewisville TX 75067 972-966-7300 Ithiel James L. Frame, MD, PhD

Vitamin B2 (Riboflavin)

Insights Insights

Your vitamin B2 levels are normal, which is good news. Adequate levels of vitamin B2 are important for many biological processes in the body, including energy production and maintenance of healthy skin and eyes. Keep up a balanced diet to ensure you continue to get sufficient levels of this nutrient.
Vitamin B2 (Riboflavin)
good
Low Desirable 6.2 – 39.0 High
19.5 nmol/L

Note: Vitamin supplementation within 24 hours prior to blood draw may affect the accuracy of results. This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics Nichols Institute, Chantilly, VA. It has not been cleared or approved by the FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Vitamin B3

Insights Insights

Your Vitamin B3 levels are within normal range, which is a positive result. Research shows that Vitamin B3 is important for overall health, as it helps convert food into energy and is essential for a healthy nervous system. It's recommended that you continue to maintain a balanced and nutritious diet to ensure your Vitamin B3 levels remain within range.
Nicotinamide
good
36 ng/mL

Note: Nicotinamide is a metabolite of nicotinic acid. Due to the large variability in the metabolism of nicotinic acid, plasma concentrations of this metabolite are variable. In one study, fasting plasma concentrations were reported to be approximately 40 ng/mL. In another study it was reported that the administration of a single 1000 mg of extended-release tablet of nicotinic acid resulted in a mean peak nicotinamide concentration of 400 ng/mL between 5 and 10 hours post dose, decreasing to about 100 ng/mL by 16 hours post dose. This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics Nichols Institute, Chantilly, VA. It has not been cleared or approved by the FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Nicotinic Acid
good
<20 ng/mL

Note: Due to the large variability in the metabolism of nicotinic acid, the dosing preparation used (immediate- release vs. extended release), and the mg doses used the serum concentrations may range from less than 20 ng/mL to about 30,000 ng/mL. After oral administration of an immediate-release tablet, peak plasma concentrations occur in 4 to 5 hours. The plasma half-life of nicotinic acid is about one hour. In one study, fasting plasma concentrations were reported to be less than 20 ng/mL. In another study, it was reported that the administration of a single 1000 mg extended-release tablet resulted in mean nicotinic acid concentrations of less than 50 ng/mL. This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics Nichols Institute, Chantilly, VA. It has not been cleared or approved by the FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Vitamin B5 (Pantothenic Acid)

Insights Insights

Your vitamin B5 levels are normal. This is good news, as vitamin B5 plays an important role in energy metabolism and the production of hormones and cholesterol. Research shows that maintaining healthy levels of vitamin B5 can help support your overall health and wellbeing. It's recommended that you continue to eat a balanced diet that includes foods rich in vitamin B5, such as avocados, mushrooms, and whole grains, to ensure you're getting enough of this essential nutrient.
Vitamin B5 (Pantothenic Acid)
good
Desirable < 275 High
56 ng/mL

Note: This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics Nichols Institute, Chantilly, VA. It has not been cleared or approved by the FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Vitamin B6

Insights Insights

Your Vitamin B6 level is high, which means that you have more than the normal amount of this vitamin in your blood. While this is generally not a concern, it's important to note that extremely high levels can sometimes cause nerve damage. It's recommended that you speak with your healthcare provider about any supplements or multivitamins you may be taking to ensure that you're not exceeding the recommended daily intake.
Vitamin B6, Plasma
high
Low Desirable 2.1 – 21.7 High
37.9 ng/mL

Note: (Note) Vitamin supplementation within 24 hours prior to blood draw may affect the accuracy of results. This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes. MDF med fusion 2501 South State Highway 121,Suite 1100 Lewisville TX 75067 972-966-7300 Ithiel James L. Frame, MD, PhD

Vitamin B12

Insights Insights

Your vitamin B12 levels are normal, which is great news. Adequate levels of vitamin B12 are important for maintaining healthy nerve and blood cells, and for preventing certain types of anemia. It's recommended that you maintain a healthy and balanced diet to ensure you continue to have normal levels of vitamin B12.
Vitamin B12
good
Low Desirable 200 – 1100 High
953 pg/mL
Sample image
Sample report
B vitamin panel for people with fatigue, low energy, and mood issues

B Vitamin Test for Fatigue and Low Energy

B Group Vitamins

Google
3,138 reviews
  • Reveal energy-boosting vitamin levels
  • Pinpoint causes of mood swings
  • Detect hidden nutrient deficiencies
$555 Example results
First results as soon as overnight*

90 day happiness guarantee

We stand behind our service

Prescription & fees included

Go directly to the lab, no extra fees

Easy to understand results

With friendly doctor's notes & guidance

Fast & convenient

Lab visit as quick as 10 mins in & out

90 day happiness guarantee

We stand behind our service

Prescription & fees included

Go directly to the lab, no extra fees

Easy to understand results

With friendly doctor's notes & guidance

Fast & convenient

Lab visit as quick as 10 mins in & out

What's this test for?

This test is ideal if you're experiencing persistent fatigue, low energy, difficulty concentrating, mood swings, or unexplained weakness. It helps identify B vitamin deficiencies that may be affecting your energy production, metabolism, brain function, and overall vitality. This test is especially important for vegetarians, vegans, older adults, or anyone who suspects their diet may not be providing adequate B vitamins.

How should I prepare for this test?

Fasting: 8 hours

You should fast for 8 hours before your blood draw, meaning no food or beverages except water during this time. It's also preferred to avoid taking any vitamin supplements for 24 hours before the test to ensure accurate baseline measurements. You can take the test at any time of day as long as you meet the fasting requirement.

What's included in this test?

Vitamin B2 (Riboflavin) Vitamin B1 (Thiamine), Blood, LC/MS/Ms Vitamin B5 (Pantothenic Acid) Vitamin B6 Vitamin B12

This comprehensive panel evaluates all major B vitamins essential for energy production and nervous system function. It checks Vitamin B1 (thiamine) for nerve health and metabolism, B2 (riboflavin) for energy conversion, B3 (nicotinamide and nicotinic acid) for cellular energy, B5 (pantothenic acid) for hormone production, B6 for brain function and mood regulation, and B12 for red blood cell formation and neurological health. Together, these measurements reveal whether vitamin deficiencies are contributing to your fatigue, brain fog, or metabolic issues.

What happens after I get my results?
You'll receive detailed doctor notes in simple language explaining what your B vitamin levels mean for your energy, mood, and metabolism. These notes include personalized recommendations like dietary changes, specific B vitamin supplements to consider, and lifestyle adjustments to improve absorption. You'll also get the standard lab report and can track your vitamin levels over time using our trends feature to see how supplementation or dietary changes are working.
When will I get my results?
Your results will typically be available within 7 business days after your blood sample is collected. If any confirmation testing is needed for accuracy, the turnaround time may be extended slightly, but you'll be notified if this occurs.
Who should consider getting this test?
This test is especially important for vegetarians and vegans since B vitamins are primarily found in animal products, making deficiency more likely. It's also valuable for older adults who may have absorption issues, people with digestive conditions like Crohn's or celiac disease, those taking certain medications that deplete B vitamins, and anyone experiencing chronic fatigue or neurological symptoms. If you follow a restricted diet or have unexplained energy issues, this test provides crucial insights.
What symptoms indicate I may need this test?
Common symptoms of B vitamin deficiency include persistent fatigue and weakness, difficulty concentrating or brain fog, mood changes like irritability or depression, tingling or numbness in hands and feet, pale skin or anemia, digestive issues, and poor appetite. If you're experiencing several of these symptoms, especially if you follow a plant-based diet or have absorption issues, testing your B vitamin levels can help identify the root cause.
How can I naturally increase my B vitamin levels?
Include more B vitamin-rich foods in your diet like meat, fish, poultry, eggs, and dairy products for comprehensive B vitamin coverage. For plant-based sources, focus on fortified cereals and breads, nutritional yeast, legumes, nuts, seeds, leafy greens, and whole grains. However, if you're vegetarian or vegan, you'll likely need a B12 supplement since it's not naturally found in plants. Improving gut health through probiotics can also enhance B vitamin absorption.
Why is Vitamin B12 so important?
Vitamin B12 is essential for producing red blood cells, maintaining healthy nerve cells, and creating DNA. Without adequate B12, you can develop anemia, which causes extreme fatigue and weakness, as well as neurological problems like numbness, balance issues, and memory problems. B12 deficiency can cause permanent nerve damage if left untreated, making it especially important to monitor if you don't consume animal products.
What does low Vitamin B6 mean?
Low Vitamin B6 can affect your mood, cognitive function, and immune system since B6 is crucial for neurotransmitter production including serotonin and dopamine. Deficiency may cause depression, confusion, weakened immunity, anemia, and skin rashes. It's often linked to inadequate dietary intake, certain medications, or conditions that impair absorption.
How often should I retest my B vitamin levels?
If you're deficient and starting supplementation, retest in 8-12 weeks to ensure your levels are improving and your dosage is appropriate. Once your levels are optimal, annual testing is usually sufficient for monitoring unless you have ongoing absorption issues or dietary restrictions. If you're making significant dietary changes or starting a plant-based diet, testing every 6 months for the first year can help ensure you're meeting your nutritional needs.
How’s this work?
Getting your blood test with us is easy, private & backed by the power of science.

Long story short:
  1. In the test options, use the filters or search box to narrow your choices and find the test you want.
  2. 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.
  3. 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.
  4. 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.
  5. 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.
  6. 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.
  7. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!
    8. If you have any questions, please text us at 754-799-7833 or email [email protected] 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 [email protected], and we'll gladly help you. We've got your back and reply quickly.
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 [email protected]. 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 [email protected].
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 [email protected].

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 [email protected] and we'll gladly help you.

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

You get clinical lab reports & simplified health insights.
Save time & gas, go straight to the lab. Our doctors cover the rest.
Results start landing the next day after your lab visit.*
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US-licensed doctors have your back if things get unclear.
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Save a trip to the doctor, go directly to the lab
Instant orders, results often overnight*
Results explained in simple language
Reviewed by US licensed doctors
Fast & confidential, we never sell or share your data
No insurance needed, transparent pricing
Demo results
Vitamin B12 285 pg/mL
Demo results
Low Optimal 300 - 900 High
285 pg/mL

What this means

Your Vitamin B12 level is slightly below the optimal range. While not critically low, this may contribute to fatigue, difficulty concentrating, or mood changes over time. B12 is essential for red blood cell production and nervous system function, so maintaining optimal levels is important for sustained energy.

Recommended actions

Include more B12-rich foods like meat, fish, eggs, and dairy in your diet

Consider a B12 supplement, especially if you follow a vegetarian or vegan diet

Ask your doctor about absorption issues if dietary intake seems adequate

Retest in 8-12 weeks after making dietary changes or starting supplementation

* Regular blood test results (e.g., CBC) typically start arriving the next business day after sample collection. More complex tests, such as hormone panels, may take up to 10–15 business days due to their complexity.
Here’s how easy it is to get blood work done on your terms
Choose a checkup
Order your test Save a trip to the doctor. Your results will come with clear, friendly explanations. Takes 2 minutes
Book a lab
Book an appointment Visit any of our 4,000 nearby lab locations to have your samples collected. Book or walk-in
Choose a checkup
Get results Receive a clear, easy-to-digest health report by email & SMS within a few business days. Get answers, fast

B Vitamin Test for Fatigue and Low Energy

Google
3,138 reviews
  • Reveal energy-boosting vitamin levels
  • Pinpoint causes of mood swings
  • Detect hidden nutrient deficiencies
$555 Example results

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

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1 year ago

Much love for private md labs. I am an athlete and bodybuilder. I diet hard and train hard so I like to get bloodwork done 4x a year to check my lipid...
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I am so impressed with my experience! I had 12 tests done and within seconds of paying, I already had my appointment scheduled with an awesome QR code...
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I was skeptical at first about scheduling labs online but this process was quick and easy. Best thing I liked was how you could custom tailor your lab...
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Still got questions? Text our super-cool support team at 754-799-7833 to get help finding your ideal checkup.