What we measure
This test measures levels of essential vitamins and minerals in your blood, as well as total cholesterol and C-reactive protein (CRP). All of these substances can be influenced by diet, so your results can provide helpful insight on whether your body is getting the sustenance it needs.
Triglycerides
Triglycerides are a type of fat that’s found in the blood. When you have high levels of triglycerides, this can contribute to the hardening of the arteries, which can increase your risk of heart disease.
HDL (high-density lipoprotein) cholesterol
Ever heard of “good” cholesterol? That’s HDL, which helps to remove other types of cholesterol from your blood and protect you from heart disease. If HDL levels are too low, the opposite can happen: your risk of conditions like stroke or heart attack can increase.
LDL (low-density lipoprotein) cholesterol
Also known as “bad” cholesterol, LDL can build up inside your blood vessels. This can increase your chances of developing heart disease.
Iron
Iron is essential to many vital processes in the body, including making haemoglobin, a protein that helps transport oxygen around the body. Without enough iron, your muscles may not get the oxygen they need to function well, which can make you feel tired.
Total iron binding capacity (TIBC)
For iron to be transported to your muscles and tissues, it needs to be carried by proteins. TIBC is a measure of how many proteins are available to attach (bind) to iron to move it through the body.
Ferritin
Ferritin is a type of protein that’s responsible for storing iron inside the body. Measuring your ferritin gives a good sense of how much iron you’ve got in reserve, and whether this is enough for your body to function normally.
Transferrin saturation
Transferrin is the main protein that attaches to iron and transports it around the body. Transferrin saturation is a calculation that tells us what percentage of your transferrin is attached to iron. This figure can help indicate an iron deficiency.
Vitamin D
Vitamin D has many essential roles in the body, including contributing to muscle, skin, and bone health, plus mood, immunity, and more. If you’re deficient in it, this can bring on symptoms like muscle aches and tiredness.
Folate
Folate is important for brain and nervous system function, helps cells to grow and multiply, and more. Low folate can cause fatigue, dizziness, and more—and contribute to health issues like anaemia.
Vitamin B12
Contributing to our brain health, nervous system function, and more, vitamin B12 is a crucial nutrient. If you don’t have enough of it, you may experience symptoms like nausea, muscle weakness, and extreme fatigue.
Magnesium
Magnesium is important for muscle and nerve function, energy production, and more. Abnormal magnesium levels can be a sign of an underlying health issue.
Calcium
Found in dairy foods and green leafy vegetables, calcium helps keep your bones and teeth strong, and your muscles healthy. Low calcium can cause symptoms like muscle cramps, or be a sign of another health issue.
Adjusted calcium
Adjusted calcium is a measure of how much calcium within your blood is available to be used by the body, because it isn’t attached (bound) to a protein. This can help us gauge whether your body is getting the calcium it needs to function properly.
Albumin
A protein made by the liver, albumin helps carry important substances like vitamins through the body. Abnormal levels can suggest that you’ve got a nutritional deficiency, or that the liver or kidneys aren’t working as they should.
C-reactive protein (CRP)
CRP is a made by the liver in response to inflammation in the body. Its levels can be influenced by lifestyle factors including diet, exercise, and whether you smoke. Eating a healthy, balanced diet can help lower elevated CRP levels.

This test can help indicate whether you’ve got a nutritional deficiency.
Most of us have the best intentions when it comes to eating a healthy, balanced diet, but for whatever reason—responsibilities, commitments, or simply not knowing which foods we should eat—we might not quite get there.
Vitamin deficiencies common in the UK, along with other diet-related issues such as high cholesterol.
It can be difficult to realise you’ve got a deficiency based on symptoms alone. For one, some symptoms are vague and could have multiple explanations (there may be 1,001 reasons why you feel irritable, for example); for another, not all deficiencies have symptoms in the early stages.
A blood test can tell you how much of each nutrient is in your bloodstream and whether this falls within a normal range. This test can give you a thorough overview of where you’re at in terms of essential vitamins and minerals, plus other health markers related to diet.
Your results:
what to expect
Your results will tell you how much of each nutrient and substance is present in your blood, and whether this is within a normal range.
Because there are recommended healthy levels for vitamins and minerals, you’ll be able to get a fairly clear overview of where you’re hitting the mark and where you might be lacking. These insights could help inform decisions for how you could live healthier, like eating more greens, for example.
However, it’s important to note that your results aren’t a diagnosis—only a doctor can diagnose you with disease or a deficiency.
Nutritional deficiencies are usually treated with dietary changes and supplements, but in some cases may be a signal that something else is going on. Speak with your doctor if you’re not sure what your results mean.

Need help? Speak with an expert
Don’t quite understand your results or simply want to see a doctor? We’ve got you sorted.
Speak to a GP
Book an online consultation with one of our GPs. We offer consultations in both English and Chinese.
Just fill out an online form and find a time that’s convenient.
Get a private prescription
Need to get your medication? Our GPs can write private prescriptions.
Tell the GP what the problem is during your consultation and they’ll take it from there. Prescriptions can be picked up at your local pharmacy.
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FAQs
It’s generally recommended that you fast before having this test. This means that you can’t eat or drink anything except water for 8-10 hours beforehand.
Your time sleeping counts as time fasting, which is why blood tests are often scheduled in the morning.
Nope, there’s no need to stop taking your regular vitamin supplements before the test.
If you’re taking a supplement containing biotin, which is commonly found in products promoting nail, skin, and hair health, it’s recommended that you stop taking it for at least 48 hours ahead of the test.
If you’ve been prescribed biotin by your doctor, then check in with them before you stop taking it.
Other than that, there’s nothing specific you need to do.
Your test results will give you a general overview of where all your nutrient levels are at, including where you may be lacking.
You can use these insights to consider which lifestyle changes you could make to live healthier: for example, if you have a low iron reading you may choose to eat more green, leafy vegetables.
However, your results aren’t a diagnosis. To confirm whether you have a deficiency, or to check if your readings are being caused by an underlying health condition, you’ll need to check in with your doctor.
Yes, our tests meet the highest standards for safety and quality. Not only are we CQC regulated, which is a quality mark for health services you can trust, but we’re also UKAS accredited and listed on the UK government website. Plus, each of our tests is validated by registered doctors and clinical scientists.
Blood tests are one of the best methods available for identifying nutritional deficiencies. They can accurately tell you how much of each nutrient is present in your blood and when those levels are abnormal.
