UK's first direct-to-consumer blood testing service. 
We've delivered over 7.5 million test results. 
We've helped over 200,000 people take control of their health. Want to check if your diet is supporting your health? Maybe you have symptoms of a vitamin or mineral deficiency such as low energy or frequent colds. Or perhaps you’re at higher risk of a deficiency due to factors such as pregnancy or a restrictive diet.
Our nutrition test checks your levels of essential vitamins and minerals, including vitamin B12, vitamin D, and magnesium, and ferritin (iron stores). It provides insights that can help you take steps to optimise your nutrition.
Total cholesterol
Learn more
LDL cholesterol
Learn more
Non-HDL cholesterol
Learn more
HDL cholesterol
Learn more
Total cholesterol : HDL
Learn more
Triglycerides
Learn more
hs-CRP
Learn more
Ferritin
Learn more
Magnesium - serum
Learn more
Vitamin B12 - active
Learn more
Vitamin D
Learn more
Despite its name, vitamin D is actually a hormone that’s produced by your skin when it’s exposed to sunshine. Before your body can use vitamin D produced by sun exposure (known as vitamin D3), it must be converted into another form called 25 hydroxycholecalciferol (25 OH). Vitamin D (25 OH) is the major circulating form of vitamin D, and so your vitamin D (25 OH) level is considered the most accurate indicator of vitamin D supply to your body.
Vitamin D is essential for healthy bones and teeth, as it helps your body absorb calcium. It also plays a role in muscle health, immune function, and mental health.
Low vitamin D symptoms include muscle weakness, mood swings, and fatigue. Many people in the UK have low vitamin D levels, and people with dark skin and people who don’t spend much time outdoors are particularly at risk.
Small amounts of vitamin D can be obtained from food, especially oily fish, eggs, and vitamin-D fortified foods. But if you have a vitamin D deficiency, you’re unlikely to be able to improve your levels by food alone.
Prepare for your Nutrition Blood Test by following these instructions. Take this test when any symptoms of short-term illness have settled. Avoid fatty foods for eight hours before your test, you do not need to fast. Take your sample at least 24 hours after any vitamin or mineral supplements. Do not take biotin supplements for two days before this test, discuss this with your doctor if it is prescribed. Do not take vitamin B12 for two weeks prior to this test. If your B12 is prescribed ask your doctor whether to stop.
Your personalised, actionable health results are only a few clicks away. Order your test, take and post your sample, then view your results online with our doctors' comments.
MyMedichecks is your personal online dashboard where you can view your results, access clear and simple explanations about individual health markers, monitor changes in your health, and securely store information about your medical history, lifestyle, and vital statistics.
Our home Nutrition Blood Test includes checks for vitamin D and active B12, as well as ferritin and magnesium, which make up some of the most common nutrient deficiencies.
It also includes a complete cholesterol profile, with a breakdown of your HDL (good) and non-HDL (bad) cholesterol, plus a test for low-level inflammation (high-sensitivity C-reactive protein). These biomarkers can be affected by your diet and indicate your risk of cardiovascular disease. So, it’s important to check them and take steps to keep them within healthy ranges.
Our Nutrition Blood Test gives you a clear picture of potential vitamin and mineral deficiencies. It will also help you identify areas where you could make changes to your diet to prevent or manage deficiencies, and indicate whether you may benefit from a supplement.
Regular testing can help you monitor the effect of any changes to your diet or supplementation.
A varied and balanced diet usually provides you with all the nutrients you need for optimal health. But, even with the best intentions, deficiencies can occur.
You may eat a healthy diet but restrict specific food groups, which can lead to a deficiency in certain vitamins and minerals. For example, if you eat a vegan or plant-based diet, you may be more prone to a deficiency in vitamin B12 or iron.
Vitamins and minerals are different types of micronutrients, which are both essential for your health in tiny (or micro) amounts.
Vitamins are organic compounds, which means they're made by plants and animals. Most vitamins are easily absorbed as they dissolve in water. Some vitamins, like vitamin D, dissolve in fats, and are better absorbed with high-fat foods. Many vitamins are heat-sensitive, so they may be broken down during cooking.
Minerals, on the other hand, are inorganic substances found in the earth and rocks. They're also found in food, but they’re not produced by living things and aren’t broken down as easily as vitamins.
When your body is not getting enough micronutrients, you may start to experience vitamin or mineral deficiency symptoms such as brain fog and fatigue.
Low levels of iron, vitamin D, or vitamin B12 can make you feel tired all the time. But each micronutrient deficiency also has its own specific symptoms. For instance, a vitamin B12 deficiency can cause pins and needles, mouth ulcers, and blurred vision, whilst an iron deficiency can leave you feeling dizzy and short of breath.
As many of these symptoms are common to several conditions, a blood test can help you pinpoint the cause.
No, you’re perfectly capable of getting enough nutrients from a plant-based diet, with the right planning. For instance, it can be more difficult to maintain healthy iron levels if you follow a plant-based diet, as plant-based sources of iron are harder for your body to absorb. But there are plenty of plant-based foods that contain a good amount of iron, including lentils, chickpeas, beans, tofu, and kale.
If you follow a plant-based diet, you may need to check you’re getting adequate levels of several essential vitamins and minerals including:
