Vitamin B7 (Biotin) Blood Test

Vitamin B7 (Biotin) Blood Test

Vitamin B7, also known as biotin, is a water-soluble B-complex vitamin essential for energy metabolism and the breakdown of carbohydrates, fats, and proteins. It also supports the synthesis of fatty acids, amino acids, and glucose, playing a key role in maintaining healthy skin, hair, nails, and nervous system function.

A deficiency in biotin can lead to symptoms such as hair loss, brittle nails, skin rashes, fatigue, low mood, and, in severe cases, neurological issues.

This test measures your biotin levels to help detect any deficiency early, enabling you to take steps to restore balance and protect your overall health and wellbeing.

If you’re not sure exactly what you need, we advise all our clients to consult with a GP or one of our Registered Nutritionists before taking any blood tests. However, below you can find more information about this panel, and we hope it will help.

IS THE VITAMIN B7 (BIOTIN) BLOOD TEST RIGHT FOR YOU?

Testing your biotin levels is recommended if you have symptoms that may indicate a deficiency, such as unexplained hair loss, skin rashes, or neurological changes. Certain groups — including those with inherited metabolic disorders, long-term parenteral nutrition, or on specific medications like anticonvulsants — may also benefit from regular monitoring.

Why Have the Vitamin B7 (Biotin) Blood Test?
Measuring your biotin levels helps ensure this vital nutrient is within optimal range, supporting energy metabolism, healthy skin, hair, and nails, and enabling better management of related health conditions.

SYMPTOMS AND TAGS

Hair loss, Low mood, Make your own test panel, Pancreas, Tiredness and Weak or brittle fingernails

1. Fill out the contact form on the main page
2. Choose your preferred panel
3. Select between a Home Kit (via post), a Clinic Appointment, or VIP service
4. Make the payment online.
5. We'll contact you to arrange a clinic appointment or a VIP service and email you with your home kit delivery details.

Not sure which panel or test is right for you? Reach out to one of our Registered Nutritionists  

COLLECTION OPTIONS

1. VIP: Home/Office/Hotel visit by our phlebotomist – Available in London UK only (1-3 days)
2. Clinic visit (24+ UK locations, 12 days)

VIP Phlebotomist Visit (London Only):

Perfect for busy individuals or corporate teams.

• Available across London.
• Once payment is received, our team will contact you to arrange your appointment — usually the same day if booked before 10 am, or the next day if later.
• Additional patients beyond 10 are charged £25 each, invoiced after the visit.
• Please select the total number of blood tests at checkout so our phlebotomist can bring the right equipment.
• Your blood will be collected by a trained phlebotomist and delivered directly to our lab for fast, accurate results.

In-Clinic Appointment:

Quick, professional, and convenient.

• Same or next working day appointment.
• We’ll contact you within 60 minutes of booking to arrange your visit.
• Your blood will be collected by a trained phlebotomist and sent directly to our lab for fast, accurate results.
• Choose your nearest clinic and skip the wait. (Check Locations)

Home Kit:

Test from the comfort of your home — anywhere in mainland UK.

• Everything you need to collect your sample in about 15 minutes.
• Return it to our lab via Prepaid Royal Mail  Tracked 24.
• Free replacement kit if anything goes wrong or more blood is needed — so you can order with confidence.

If the purpose of the test is to find the levels of your vitamin supplementation, then you should continue taking these as normal.

If you are combining this test with any other, please inform us of your supplementation so that we can make sure the results are not affected for tests such as thyroid function. You will most likely have to stop taking your supplements, and we advise to consult your GP or Nutritionist.

Clinic appointment - how to prepare for the Vitamin B7 (Biotin) Blood Test

If you are coming into one of our clinics for the test, this is what you need to do before you arrive:

• Read the instructions in the SPECIAL INSTRUCTIONS section
• Drink plenty of water about an hour before the appointment.
• Avoid coffee/tea/energy drinks. Water is good!
• That’s it! We’ll do the rest.

We look forward to receiving your sample in our lab!

Vitamin B7 (Biotin)

We always encourage you to visit one of our Clinique for any of our blood tests.

HOME KIT VIA ROYAL MAIL TRACKED 24

Not Available.

CLINIC APPOINTMENT - SAME OR NEXT WORKING DAY

This service costs additional £38.00 and includes:

• No waiting. We will call you within 2 hours to book your appointment for the same day when purchased before 10am or the following day if later than 10am.
• Quick blood collection from your vein, by our professional phlebotomist.
• Blood transported directly to our laboratory - for quick and accurate results.

No home kit is available for this panel.

We are extremely fast, with some results available within hours and others within a working day or less, from the time your sample is in our lab. However, this is not a guarantee and should not be taken as such. This is the guideline turnaround time that can be shorter or longer.

THIS IS NOT A GUARANTEED TURNAROUND TIME

We are extremely proud of our very short turnaround times and very efficient laboratory processes; you will receive your results as soon as they are available and have completed clinical validation.

Whilst we accommodate the shortest time scales, with some results available within hours, for some tests the turnaround time is 12 working days.

DR. ADAM STATEN - GP VIEW AND RED FLAG SYMPTOMS

While biotin deficiency is relatively rare, excessive intake from supplements can interfere with certain laboratory tests, leading to incorrect diagnoses.

For example, high biotin levels can affect tests for thyroid function, hormone levels, and cardiac biomarkers.

Monitoring biotin levels ensures that supplementation is necessary and maintained at a safe level.

Red flag symptoms for the Vitamin B7 (Biotin) Blood Test

Please contact your GP if you experience persistent symptoms of any kind.

Who should be concerned about biotin deficiency?

Biotin deficiency is relatively rare, but certain groups are at higher risk. These include individuals with genetic disorders like biotinidase deficiency, those on long-term parenteral nutrition, people taking certain anticonvulsant medications, pregnant women, and individuals with chronic alcohol use.

These groups may benefit from regular monitoring of biotin levels to prevent deficiency.

What symptoms might indicate a biotin deficiency?

Signs of biotin deficiency can include hair loss, skin rashes (especially around the eyes, nose, and mouth), brittle nails, fatigue, depression, neurological symptoms (such as numbness and tingling in the extremities), and conjunctivitis.

If you experience any of these symptoms, it's advisable to consult a healthcare provider and consider testing for biotin levels.

How does biotin supplementation interfere with lab tests?

Yes, high levels of biotin from supplements can interfere with various lab tests, including those measuring thyroid hormones, troponin (a cardiac marker), and other hormones. This interference can lead to false results, potentially causing misdiagnosis or inappropriate treatment.

If you are taking biotin supplements, inform your healthcare provider before undergoing lab tests.

Can I see a GP to discuss my Results?

Yes, usually the same or next day.

Our fantastic partner clinical team of consultants and GPs. Once you have your results, you can book an online video consultation to discuss your results.

Our clinical team consists of practicing NHS and private GPs, who work closely with our laboratory and can tell you what your blood test results mean for you. Having an integrated laboratory and GP services makes your health journey seamless and extremely efficient.

This service is not included in the price of the test, it is charged separately, should you wish to book it.

Will I have a general explanation of my results?

Yes, our doctors put a huge amount of effort into your online Health Dashboard, which will have explanations of what each biomarker is, the normal reference ranges and what it means if you are outside of them.

QUICK AND ACCURATE RESULTS DIRECT FROM THE LABORATORY.

We partner with regulated laboratories and accredited clinics that manufacture their own approved home sample collection kits. Your results are looked after by our fantastic clinical governance team and a super-talented biomedical science team.

When you book your test with us - you book directly with the lab. This means accuracy and responsible duty of care, direct access to the provider and extremely fast turnaround times.