Nutrition

Understanding your nutrient levels can be a useful step towards improving how you feel day to day. A nutritional blood test can help you identify potential imbalances or deficiencies that may influence energy, mood, and overall wellbeing, including markers such as vitamin B12 and vitamin D. Testing can also highlight unexpected findings, such as high calcium in the bloodstream, which may warrant further attention. Whether you’re looking to plan healthy eating habits or assess the impact of iron-rich foods in your diet, personalised insights from blood testing remove guesswork and support more informed decisions about your health.

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Selenium Blood Test

Worried about low selenium levels? Selenium is an essential mineral that supports thyroid function, immune health, and antioxidant protection

  • Results estimated in 7 working days
  • 1 biomarkers
£101.00
Vitamin A (Retinol) Blood Test

Concerned about your vision, skin health, or immune function? This test measures vitamin A (retinol) levels, an essential nutrient that supports eye health, immune response, and cell growth

  • Results estimated in 8 working days
  • 1 biomarkers
£119.00
Vitamin B12 (Active) and Folate Blood Test

Feeling fatigued, struggling with brain fog, or experiencing tingling sensations? This test measures active vitamin B12 and folate, two essential nutrients that support energy levels, brain function, and red blood cell production

  • Results estimated in 4 working days
  • 2 biomarkers
£83.00
Vitamin E (Alpha Tocopherol) Blood Test

This blood test measures the levels of vitamin E, an important antioxidant that supports the formation of red blood cells, helps maintain a healthy immune system, and aids the body in using vitamin K effectively

  • Results estimated in 10 working days
  • 1 biomarkers
£101.00
Biotin Blood Test

Measure your levels of biotin, also known as vitamin H or co-enzyme R, an essential water-soluble vitamin, important for healthy skin, hair, and metabolism

  • Results estimated in 8 working days
  • 1 biomarkers
£129.00
Vitamin B2 (Riboflavin) Blood Test

Experiencing fatigue, cracked lips, or a sore tongue? This test measures vitamin B2 (riboflavin), a vital nutrient that supports energy production, skin health, and eye function

  • Results estimated in 9 working days
  • 1 biomarkers
£102.00
Vitamin B3 (Niacin) Blood Test

Vitamin B3 (niacin) plays a vital role in converting food into energy, supporting skin health, and maintaining the nervous system

  • Results estimated in 8 working days
  • 1 biomarkers
£99.00
Vitamin K (Nutritional) Blood Test

This blood test measures the levels of vitamin K, which plays a crucial role in blood clotting, regulating blood calcium levels, and supporting healthy bone metabolism

  • Results estimated in 9 working days
  • 1 biomarkers
£149.00
“Testing your vitamin and mineral levels provides clear, objective data that can help explain symptoms and support informed health decisions.”

Dr Natasha Fernando, Medical Director, Medichecks

Not sure which test to choose?
  • Feeling tired? Look for tests including iron, B12 and Vitamin D
  • Following a plant-based diet? Check B12 and iron levels
  • Want a full overview? Choose a comprehensive nutrition panel
Signs you might need a nutrition test

Consider testing if you experience:

  • Persistent fatigue
  • Brain fog
  • Hair thinning
  • Low mood
  • Muscle weakness

FAQs

What does a nutrition blood test check for?

A nutrition blood test measures key vitamins and minerals in your blood, such as Vitamin D, Vitamin B12, folate, iron, magnesium and zinc. These nutrients support energy, immunity, mood, cognitive function and overall health. Testing helps identify deficiencies or imbalances that may be affecting how you feel.

Can a blood test detect vitamin deficiencies?

Yes. Blood testing is one of the most reliable ways to identify vitamin deficiencies. It measures the actual levels of nutrients circulating in your bloodstream, helping to detect low or suboptimal levels before symptoms become more severe.

How do I know which nutrition test is right for me?

The right test depends on your symptoms and goals.

-If you're experiencing fatigue, consider a test that includes iron, ferritin, Vitamin B12 and Vitamin D.

-If you follow a vegetarian or vegan diet, monitoring B12 and iron is especially important.

-If you want a full overview, choose a comprehensive nutrition panel that covers multiple markers in one test.

Can I check my vitamin levels at home?

Yes. Many nutrition blood tests use a simple finger-prick sample that you can collect at home and send to our laboratory. Results are reviewed by doctors and delivered securely online.

How accurate are at-home nutrition blood tests?

Our tests are analysed in UK-accredited laboratories using validated clinical methods. When you follow the sample instructions carefully, at-home tests provide accurate and reliable results comparable to those taken in a clinic.

Do I need to fast before a nutrition blood test?

Some nutrition tests may require fasting, while others do not. Always check the instructions for your specific test before taking your sample to ensure the most accurate results.

How long does it take to get results?

Most results are available within a few working days after your sample reaches the laboratory. You’ll receive an email notification when your secure report is ready to view online.

How often should I test my nutrient levels?

If you are correcting a deficiency, testing every 3–6 months can help monitor progress. For general health monitoring, testing once a year is common, particularly if your diet or lifestyle changes.

What happens if my levels are low?

Your report includes doctor-reviewed commentary explaining what your results mean and practical next steps. This may include dietary guidance, lifestyle advice or suggestions to speak with your GP.