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Nutricheck – Vitamin Deficiency Test

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Our vitamin blood test - Nutricheck - checks whether your diet is giving you all the nutrients your body needs, including B12, magnesium, vitamin D, and iron (ferritin). We also check how healthy your diet is by measuring key markers for heart and liver health.
What's included
your discount will be applied at checkout

Why take a Nutrition test?

If you want to optimise your nutritional intake, or you’re worried that a particular diet pattern may be leaving you deficient, then the nutrition blood test will benefit you.

The Nutricheck test gives you a comprehensive look at your body’s levels of the following key nutrients:

Active B12, Magnesium, Vitamin D and Ferritin (iron).

But that’s not all. Our nutrition blood test doesn’t just provide a vitamin levels check, it also assesses your cholesterol levels, both good (HDL) and bad (LDL), as well the level of inflammation in the body, which can rise due to poor diet.

When to take This test

The sample for this test is best taken in the morning and before food.

  • Active vitamin B12
  • Magnesium
  • Vitamin D
  • Ferritin

Who is most at risk of vitamin deficiency?

According to our research, vitamin deficiencies can affect all age groups in the UK. Some groups in society are at a greater risk of certain deficiencies such as vegans and vegetarians who have an increased risk of vitamin B12 deficiency.

Everyone in the UK, on the other hand, is at risk of vitamin D deficiency. Individuals from African, African-Caribbean and South Asian origin may be at a higher risk because their bodies may not be able to make as much vitamin D.

On average the NHS spends £1.9 million on vitamin B prescriptions each month and a further £8.5 million on vitamin D perscriptions.

Sugar Reduction
of Forth customer decreased the amount of sugar in their diet between their first and subsequent test.
Optimal Levels
of Forth customers were found to have sub-optimal levels of vitamin D (>75 nmol/L).

What are the symptoms
of vitamin deficiency?


The symptoms of vitamin deficiencies are varied but can include:

  • Sore, red tongue
  • Mouth ulcers
  • Pins and needles
  • Blurred vision
  • Irritability
  • Depression
  • Reduced cognitive ability
  • Diarrhoea
  • Numbness and tingling in feet and hands
  • Muscle weakness
Prolonged Symptoms

If deficiency is prolonged, it can result in anaemia. The symptoms of anaemia can include:

  • Fatigue
  • Low energy levels
  • Headaches
  • Shortness of breath
  • Pale skin
  • Weight loss
  • Loss of appetite
  • Heart palpitations
Dr Nicky Keay
the Experts Opinion

“Our diet plays a crucial role in our health, providing us with essential nutrients to enable our bodies to function properly. A vitamin deficiency can therefore have wide-ranging effects on our health from weak bones to frequent colds, low energy, fatigue, depression, and digestive issues. Generally, we can get all the nutrients we need through our diet, so it’s important to check that your diet is providing these vitamins and minerals. This test measures some of the essential nutrients such as vitamin D, B12, magnesium, iron, ferritin, and folate. Knowing where your diet is lacking can help you make the right changes and also inform you whether or not you need supplements.”

Dr Nicola Keay
Forth Chief Medical Officer

improve your unique self

Want to improve your health & wellbeing? Forth gives you insight into your body’s key biomarkers. By tracking essential markers overtime you can build a picture of your own unique self and discover how your body responds to the changes you make so you can reach your personal best.

Frequently asked questions

 Here are some of the most frequently asked questions. If you need anything else try our help section.

  • What is vitamin deficiency?

    Vitamin deficiency occurs when you have a chronic lack of a specific vitamin. If the deficiency is caused by poor nutrition then it is called primary deficiency but if it’s caused by an underlying condition, it’s known as a secondary deficiency.

    Secondary deficiencies can be caused by things such as malabsorption, chemotherapy, or diseases such as HIV.

  • What nutritional supplements should I take?

    Most people don’t need to take supplements because a diet rich in carbohydrates, a variety of fruit, vegetables, beans, and pulses as well as good sources of protein should provide your body with the nutrients it needs.

    However, it is recommended that everyone in the UK should take a vitamin D supplement, particularly during the winter months because of the lack of sunlight.

    You can find out more in our blog on supplements.

  • What vitamins and minerals do vegans lack?

    Despite some of the benefits of a meatless diet, vegans and vegetarians are at an increased risk of vitamin B12 deficiency. That’s because vitamin B12 is only found in animal products. So, it is vital to plan a vegan or vegetarian diet properly to make sure you don’t miss out on essential nutrients.

    Iron is another nutrient which individuals who follow a meat-free diet can become deficient in, especially women who are already at a greater risk. Iron is essential for the production of red blood cells, particularly for the formation of haemoglobin, the red pigment essential for carrying oxygen to requiring tissues.

  • What is HDL on a blood test?

    HDL stands for high-density lipoproteins and is considered ‘good’ cholesterol because it transports cholesterol from your blood to the liver where it is removed from the body.

  • What is LDL cholesterol?

    LDL stands for low-density lipoproteins and it’s this type which is known as ‘bad’ cholesterol because it transports cholesterol from the liver to the tissues in the body. A build-up of LDL can cause plaques of cholesterol to form on artery walls, restricting blood flow. This can increase the risk of blood clots and could block the flow of blood to the heart and/or brain.

  • What blood test checks for vitamin deficiency?

    If you want to test and track a specific vitamin or mineral, our vitamin D, ferritin, vitamin B12 tests will give you a clear and accurate result of these nutrient levels. However, the advantage of our Nutricheck is that you can accurately measure multiple micronutrient levels all in one test which is far more cost-effective.

  • What percentage of the population has vitamin D deficiency?

    According to our own data, 27 % of people have insufficient or deficient levels of vitamin D. Deficiency is defined at less than 25 nmol/L while insufficiency is 25-49 nmol/L.

    Almost three-quarters of people (74%) had vitamin D levels which fell below the optimum recommended for wellbeing. Both men and women are at risk of vitamin D deficiency in the UK and it can have unwanted health consequences for both genders, including:

    • Depression
    • Hair loss
    • Bone pain
    • Muscle pain
    • Fatigue
    • Recurrent infections
  • What foods contain vitamin B12?

    Vitamin B12 is usually only present in animal-based foods, but there are some fortified breakfast cereals and non-dairy milk available. Good sources include:

    • Beef
    • Tuna
    • Liver
    • Clams
    • Salmon
    • Trout
    • Sardines
    • Yoghurt
    • Milk
    • Eggs
  • What is CRP?

    CRP or c-reactive protein is a protein found in the blood when there is inflammation present in the body.

    It has been used for years as a biomarker for infection and inflammation by the medical world. The CRP test can detect inflammation associated with atherosclerosis (fatty plaques in the arteries which increase the risk of heart attacks and strokes).

    It is important to detect inflammation because it is a precursor to most diseases.

Want To Personalise Your test?

Would you prefer to test more biomarkers in the same sample of blood? All our tests are customisable and can be tested in just one sample of blood. Click the button below to add more biomarkers to this test.

Get 10% off your first order, plus great health tips, advice and support from our expert team.