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Diagnostic Kits

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With the rapid advances in technology and science that have been made in recent years, it should come as no surprise that many diagnostic tests that were once only accessible via a medical professional, can now be started from the comfort of your own home.

What kind of diagnostic kits are available over the counter?

There are so many different diagnostic kits available on the market including those that help measure important markers of your thyroid health, checking your testosterone levels, taking a vitamin D test  or a DNA test.

Here we look at some of the most common.

How to use home diagnostic tests

Generally, the test kits involve you first registering your pack with the company supplying the product, before using the equipment provided – such as collection tubes, alcohol swabs, lancets, etc. – to take a saliva sample or blood sample.

This sample is then sent off in the supplied packaging to a UKAS accredited laboratory and you then just wait for the results.

General health check kits

While most home health check kits tend to look at one specific biomarker of health, there are general check-up kits available which give you a better overall idea of your current health status.

Medichecks Health and Lifestyle Check is designed to find out if your diet could be healthier by checking important health markers, such as cholesterol; key vitamins; iron storage and kidney function.

The test requires a simple finger prick blood test. Once the results have been analysed, you will get access to a doctor’s interpretation of the results, along with advice on what to do next.

DNA testing

If you do not like the idea of pricking your finger, another way to get a more rounded idea of your body’s health status is via a DNA test kit, which only requires a saliva sample.

A DNA home test can give you a wide range of biological information, from sleep to stress to mental health, gut health and vital clues about your dietary needs.

The company Muhdo offers two types of genetics testing via a simple home DNA kit.

Muhdo DNA Genetic Collection Kit comes with a free app that will reveal all your genetic data related to health.

You will also get a free personalised workout planner and meal planner aligned to your DNA.

Recent advances mean that home genetics health testing can now provide extra about your lifestyle. This information is called epigenetics.

Muhdo DNA + Epigenetics Genetic Collection Kit provides all the same information as the aforementioned DNA home test kit, but also extra information about your current biological age (as opposed to chronological), as well as the status of your memory, inflammation, eye and ear health.

Vitamin B12 test

It may be the case that you do not want a full health check. But you might suspect that you are lacking certain nutrients from your diet.

For example, vegans and vegetarians are particularly prone to Vitamin B12 deficiency. In which case, there are several specialist tests that might be suitable for you.

If you suspect that you may not be getting a varied, healthy diet, you might want to opt for a Vitamin B12 test, such as Medichecks Vitamin B12 (Active) Test

This is especially relevant for vegans and vegetarians, as well as people with digestive problems.

Vitamin B12 benefits include normal red blood cell formation and normal functioning of the nervous system.  

If you discover you have a low B12, you may need to improve your diet; take Vitamin B12 injections;  a B12 supplement (usually Vitamin B12 tablets) or even a Vitamin B complex tablet, which contains all the B vitamins, including B12.

Vitamin D test 

What is Vitamin D and why is it so important?

Sources of Vitamin D include food like oily fish, red meat and eggs. However, our main source is sunlight.

Also known as the “sunshine vitamin” Vitamin D is essential for maintenance of normal teeth and bones.

During the recent Covid-19 pandemic, the NHS recommended that adults take 10 micrograms per day of Vitamin D via a supplement.

Those at naturally higher risk of low Vitamin D levels include:

  • those with darker skin
  • older adults
  • obese people
  • anyone who stays indoors a lot
  • anyone living in a country that does not have year-round sunshine

Luckily, you can now easily get a kit for Vitamin D testing, such as Medichecks Vitamin D Test.

A simple blood sample can tell you whether you might need a top-up with a Vitamin D supplement.

Cortisol and stress test

Another common home test is for the hormone cortisol.

A cortisol test can help you discover if your stress levels are too high.

High cortisol levels can lead to problems regulating blood pressure and controlling blood sugar levels.

Medichecks Cortisol Stress Test checks your cortisol levels throughout the day.

A simple saliva sample will give you an idea of whether stress could be interrupting your natural bodily rhythms.


Testosterone is a hormone which is found in humans and other animals. Both women and men have testosterone, although women have much smaller amounts compared to men.


In men, testosterone is made by the testicles.


Testosterone increases significantly during puberty and then starts to decline around the age of 30.


If you are struggling to gain muscle mass or have a low libido, it could be due to declining testosterone.


Take a Medichecks Testosterone Blood Test at home to check your levels.

The thyroid is an important gland, situated in the neck. It is the shape of a butterfly and is positioned just in front of the windpipe.

One of the main functions of the thyroid is to produce hormones within the body called triiodothyronine and thyroxine. These hormones help to regulate the body’s metabolism.


The metabolism is a chemical process which your body uses to function, including the breakdown of your food and drink and converting it into energy.

An overactive thyroid is where the thyroid produces too much of the thyroid hormones. It can affect both men and women but it is 10 times more common in women.


Overactive thyroid


Symptoms of an overactive thyroid include nervousness and anxiety, mood swings, difficulty sleeping, tiredness, heat sensitivity, heart palpitations and weight loss.


Underactive thyroid


An underactive thyroid is where the thyroid does not produce enough of the thyroid hormones.


Symptoms of an underactive thyroid include tiredness, sensitivity to cold, weight gain, constipation, depression, muscle aches, dry skin, brittle hair and nails, loss of libido and irregular periods.


The Medichecks Thyroid Function with Antibodies Blood Test is a laboratory test, with simple at-home collection, which checks your thyroid function.

Vitamin B12 is an important nutrient. It helps to support the normal formation of blood cells, as well as the normal function of the immune system.

Vitamin B12 is found in fish, meat, poultry, eggs and dairy products. Beef in particular is one of the best sources of vitamin B12.


Vegan sources of vitamin B12 include fortified breakfast cereals and nutritional yeast.


Low levels of vitamin B12 in the body can lead to fatigue, difficulty focussing and concentrating and poor memory function.