Vitamin D Blood Test
Results in 2 working days
Do you often feel tired or rundown? These could be signs of a vitamin D deficiency. Check your vitamin D levels with our home blood test.
1 Biomarker
£50
Or 3 interest-free payments of £ 16.67
Results in 2 working days
14 Biomarkers
Identify key nutrient gaps with Nutricheck, the ultimate at-home vitamin deficiency test. This comprehensive nutrition blood test checks 14 vital biomarkers, including active B12, vitamin D, ferritin, and magnesium.
£109
3 Interest-free payments Learn more
What gets tested?
14 Biomarkers
Blood sample collection options
WHEN TO TAKE THE TEST?
Collect your blood sample within 3 hours of waking and before food.
Vitamins and minerals form the foundation of good health, influencing everything from your immune system and energy levels to hormones and heart health. Yet, many people remain unaware of hidden deficiencies affecting their well-being. Nutricheck is a comprehensive at-home vitamin deficiency test designed to help you take control of your health by identifying key nutrient gaps.
We looked at over 10,000 results from Forth customers in January 2025 and found some shocking statistics:
By identifying these deficiencies early, you can make informed changes to your diet, supplements, and lifestyle. Nutricheck empowers you to take charge of your nutritional health from the comfort of your home.
14 Biomarkers
Active B12
Active B12 measures forms of B12 which are available for direct use by the body. This vital vitamin helps to boost energy, improve mood, and enhances cognitive function. It can mainly be found in fish, dairy products and meat such as beef, which is why vegetarian and vegans are more prone to deficiency.
Vitamin D (25 OH)
Vitamin D is essential for healthy bones, immune function, muscle performance, energy, mood and reducing inflammation. It's primarily produced through sunlight exposure and only small amounts can be consumed through diet.
Corrected Calcium
Calcium is the most abundant and one of the most important minerals in the body. Calcium is vital for cell signalling, and the proper functioning of muscles, nerves, and the heart. Foods best for boosting calcium include; dairy products, leafy green vegetables, nuts and legumes.
Magnesium
Magnesium is a vital trace element essential for maintaining strong bones, regulating blood pressure, facilitating muscle contraction, and producing energy. Since the primary source of magnesium is through diet, testing your magnesium levels can identify deficiencies and help you make necessary dietary adjustments for optimal health.
Ferritin
A ferritin test measures the total level of iron stored in your body. Iron is crucial for energy production, immune function, cognitive health and muscle performance. Including iron-rich foods such as red meat, dark leafy vegetables and whole grains in your diet is essential for maintaining healthy levels.
Full Blood Count
A Full Blood Count (FBC) test measures various components of blood. In this test it includes red and white blood cell count together with haemoglobin. These tests helps identify conditions like anaemia, a common cause of fatigue, where the blood lacks enough healthy red blood cells to carry adequate oxygen to the body's tissues.
Haemoglobin A1c (HbA1c)
HbA1c provides an average reading of blood sugar levels over a period of 2-3 months. It is considered one of the best indicators of pre-diabetes. Healthy HbA1c levels can be maintained by managing carbohydrate intake, increasing fiber, balancing protein and healthy fats, limiting sugar and moderating alcohol consumption.
Cholesterol (lipid panel)
A cholesterol or lipid panel test measures various cholesterol components to assess cardiovascular disease risk. Too much saturated fats in your diet raises LDL cholesterol levels increasing the risk of heart disease and stroke.
Getting the insights you need to improve your health has never been easier.
It takes just a few minutes to collect a small blood sample from your fingertip using the Nutricheck kit. Simply use the Tracked-24 envelope provided to securely send your sample to our labs for analysis.
Receive your results within 2 working days of your sample reaching our lab. Access them in our mobile app, where you’ll find key insights into your vitamin and nutrient levels, an optional doctor’s comment, and a detailed, easy-to-understand report.
Your personalised report highlights specific deficiencies and offers tailored recommendations to help you optimise your diet, boost energy, and support overall well-being.
51% of Forth customers have a nutrition health score below the optimal range. Get answers and take control of your health with Nutricheck and HealthCoach.
"A Vitamin Deficiency Blood Test is a powerful tool for optimising health. It identifies deficiencies in essential vitamins like D, B12, and folate, guiding your nutrition and supplementation. Addressing deficiencies can enhance energy levels, immune function, and overall well-being, preventing long-term health complications and promoting vitality."
Dr Thom Phillips
Clinical lead
Our team of specialist doctors, dieticians and biomedical scientists are here to help you be in the best of health.
This is what our customers ask us about the most. For more information, try our help centre.
What does this test check?
Our Nutricheck vitamin deficiency blood test checks a wide range of essential vitamins, minerals, and key health markers to give you a complete picture of your nutritional and overall health.
It tests for critical vitamins like Vitamin D (25 OH) and Active B12, both vital for energy, immune support, and bone health. It also checks Magnesium (serum) and Corrected Calcium, which are important for muscle function, nerve health, and bone strength.
In addition to vitamins and minerals, Nutricheck assesses your iron stores with Ferritin levels and measures Haemoglobin and Red Blood Cell (RBC) counts to detect signs of anaemia.
For metabolic health, the test includes HbA1c to monitor blood sugar control, along with a full cholesterol profile—including Total Cholesterol, HDL (good cholesterol), LDL (bad cholesterol), Triglycerides, and HDL Ratio—to give insights into your heart health.
We also evaluate your White Blood Cell (WBC) count to help monitor immune system function.
What causes vitamin deficiencies in men?
Vitamin deficiencies in men can result from poor dietary choices, limited sun exposure (affecting Vitamin D levels), or chronic stress. Lifestyle factors like excessive alcohol consumption or intense physical activity without proper nutrition can also deplete key nutrients.
Medical conditions such as digestive disorders (e.g., Crohn’s disease or celiac disease) can interfere with nutrient absorption. As men age, absorption of vitamins like B12 and minerals like magnesium may decrease, increasing the risk of deficiencies.
Nutricheck helps identify these deficiencies, guiding you toward the right changes to improve your health.
What causes vitamin deficiencies in women?
Vitamin deficiencies in women can stem from dietary gaps, hormonal changes (such as pregnancy, menstruation, or menopause), and lifestyle factors like stress or restrictive diets.
Women are especially prone to iron deficiency due to menstrual blood loss, and deficiencies in Vitamin D and Calcium can become more common post-menopause, affecting bone health. B12 deficiencies may also occur, particularly in women following vegetarian or vegan diets.
With Nutricheck, you can pinpoint exactly which nutrients you’re lacking and take control of your health with personalised recommendations.
What are the symptoms of vitamin deficiency?
Vitamin and mineral deficiencies can cause a range of subtle to severe symptoms. You should consider testing with Nutricheck if you experience any of the following:
If you’re experiencing any of these symptoms, Nutricheck can help identify whether a deficiency is the root cause.
What can vitamin and mineral deficiencies cause?
Untreated vitamin and mineral deficiencies can lead to serious health problems over time:
Identifying and addressing these deficiencies early with Nutricheck can help prevent long-term health complications and improve your overall well-being.
Can I share my results with my doctor or nutritionist?
Yes. Once you receive your Nutricheck results in our easy-to-use app, you can download and share them directly with your doctor, nutritionist, or healthcare provider. This makes it simple to discuss your results and create a personalised plan to address any deficiencies or imbalances identified in your test.
What should I do if my results show a deficiency or imbalance?
If your Nutricheck results highlight a deficiency or imbalance, don’t worry, you’re one step closer to taking control of your health. Our app provides personalised insights and guidance on how to improve your nutrient levels through diet and lifestyle changes.
Is there an age requirement for using Nutricheck?
All Forth blood tests, including Nutricheck, are suitable for adults aged 18 or over.
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