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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Vitamin D (25 OH) Blood Test

Do you often feel tired, rundown, or struggle with muscle aches and pains? You may have vitamin D deficiency, especially if you spend little time outdoors, have darker skin, or are over 65 — all factors that can affect your ability to produce vitamin D

  • Results estimated in 2 working days
  • 1 biomarkers
£39.00
Iron Blood Test

Feeling constantly tired or struggling with low energy? Your iron levels could be the reason

  • Results estimated in 3 working days
  • 5 biomarkers
£49.00
Vitamin B12 (Active) Blood Test

Are you experiencing symptoms of low vitamin B12, such as extreme tiredness, low energy, muscle weakness, or poor memory?

If your diet lacks B12-rich foods like meat, fish, or dairy, or you have a health condition that affects absorption—such as Crohn’s or coeliac disease, or pernicious...

  • Results estimated in 2 working days
  • 1 biomarkers
£39.00
Nutrition Blood Test

Discover if your diet is truly supporting your health with a comprehensive look at essential vitamins and minerals

  • Results estimated in 2 working days
  • 11 biomarkers
£89.00
Ferritin Blood Test

Are you at high risk of iron-deficiency anaemia, like increased blood loss or dietary deficiency, or do you have symptoms of iron overload, such as diabetes and liver disease? Our simple blood test measures your ferritin levels (a protein that stores iron in your body) to tell you whether your...

  • Results estimated in 2 working days
  • 1 biomarkers
£39.00
Magnesium (serum) Blood Test

Feeling fatigued, experiencing muscle cramps, or struggling with low energy? Magnesium is essential for muscle function, nerve signalling, and heart health, but low levels can often go unnoticed

  • Results estimated in 3 working days
  • 1 biomarkers
£55.00
Omega-3 and -6 Blood Test

Are you getting the right balance of healthy fats? Omega-3 and omega-6 fatty acids play a crucial role in heart health, brain function, and inflammation control, but an imbalance can contribute to chronic inflammation and cardiovascular risk

  • Results estimated in 16 working days
  • 2 biomarkers
£99.00
Advanced Vitamin B12 Blood Test

Get detailed insights into your vitamin B12 levels, including active B12 markers, to understand the root causes of low energy, mood changes, and cognitive difficulties

  • Results estimated in 3 working days
  • 18 biomarkers
£89.00
“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.