Tiredness and Fatigue Blood Test

Tiredness and Fatigue Blood Test
Tiredness and Fatigue Blood Test - welzo
Tiredness and Fatigue Blood Test - welzo
Tiredness and Fatigue Blood Test
Tiredness and Fatigue Blood Test
Tiredness and Fatigue Blood Test - welzo

Tiredness and Fatigue Blood Test

64 Reviews

A Tiredness and Fatigue Blood Test is a common way to determine the cause of your symptoms. The test can help identify if you have anaemia, a thyroid disorder, or another fatigue related health condition.

Free next-day delivery
Results within 2 days
What does it test for?
  • Iron
  • Ferritin
  • Transferrin Saturation
  • TIBC
  • Vitamin D
  • TSH
  • CRP HS

Don’t just take our word for it

Assistant Athletic Trainer
Jordan Waits reviewed welzo.com
"I simply ordered the test online, received it in the mail a few days later, and took the test in the comfort of my own home using a quick finger prick. The instructions were clear and easy to follow, and the process itself was quick and painless."
Health & LIfe Coach
Roxy Richards reviewed welzo.com
"I followed the recommendations provided by Welzo, and I have to say, I feel so much healthier now. I have a lot more energy, and I just feel better overall. It's amazing how much of a difference small changes can make"
Digital Marketing Consultant
Niall Bert reviewed welzo.com
"When I received my results, I was very interested to see some hormonal imbalances. I didn't even know that was a possibility! But the Welzo report provided me with clear and detailed information about what was going on inside my body, and what I needed to do to address the imbalances."
  • Biomarkers
  • Information


Iron is a mineral found within the blood, and is needed to help create haemoglobin which is a protein in the blood responsible for the transport of oxygen within the body's blood cells. If the body does not have enough haemoglobin, the muscles do not get enough oxygen and cannot work properly. It is important for people to have the correct amount of iron otherwise they will feel more tired and become Anaemic. The body's iron stores are sourced from one's diet and from the breakdown and turnover of red blood cells. When a test reveals low iron levels, a change in diet or added supplements can be used for treatment.

Total Iron Bounding Capacity (TIBC)

Too much and too little iron in the body can lead to problems. The Total Iron Bounding Capacity Test measures the amount of iron within the bloodstream. The test also measures how well the iron is transported around the body via the transferrin. Anemia is the condition of not having enough iron in the blood. Having too much iron in the blood is rarely caused by an overdose of vitamins or supplements and can cause symptoms ranging from feeling tired and weak to an irregular heart rhythm.

Vitamin D

Vitamin D is a vitamin that's essential for many functions in your body, including bone and muscle health. Vitamin D can be found in food, supplements, and fortified foods. If you don't get enough vitamin D, you may develop osteoporosis or muscle weakness. An average vitamin D level is 20 to 50 ng/mL. If you have a low vitamin D level, we may recommend that you take a vitamin D supplement or eat foods fortified with vitamin D.


To check inflammation levels, we conducted an advanced CRP evaluation. C-Reactive Protein (CRP) is a protein found in the blood which increases in response to inflammation. CRP is produced by the liver in response to inflammation. It is a biomarker of inflammation that is strongly associated with the risk of cardiovascular diseases, such as heart attack and stroke. High levels of CRP are found in people with chronic inflammatory diseases, such as rheumatoid arthritis, and in people who have had a recent heart attack or stroke. CRP is not a specific marker for any one disease, but it is a valuable indicator of inflammation.


Ferritin is the protein that stores iron in the body. Iron is needed to provide muscles with oxygen so that they receive the energy they need to function properly. Ferritin will release the iron when needed and is kept within the body's cells, most commonly found in the liver. We check ferritin levels to ensure that there is proper storage of iron in the body's cells otherwise the iron will be depleted quickly.

Transferrin Saturation

Transferrin Saturation is tested to measure how much the protein is saturated by iron that it will then transport around the body. The transferrin binds itself to iron and ensures it delivers the haemoglobin and oxygen the iron has provided to the muscles to be used as energy for movement.


Thyroxine (T4)

Thyroxine or T4 exists 

Thyroxine (T4) is the hormone that has several important functions in the body, including speeding up the rate of metabolism, growth and energy levels. We test the thyroxine within the body to get an indicator of how well the thyroid is functioning. There are different treatments depending on if the thyroid is under or over the normal levels.

Symptoms of Tiredness and Fatugue

  • Weight changes
  • Difficulty sleeping or insomnia
  • Headaches
  • Sore or aching muscles
  • Muscles weakness
  • Slow reflexes or responses
  • Impaired decision making
  • Moodiness
  • Impaired co-ordination
  • Poor concentration
  • Short-term memory problems

Additional Information

A simple blood draw is all that is needed to get the results of this test. 

If you are experiencing extreme tiredness, it is important to speak with your doctor to determine if a blood test is right for you.

Additional Insight from Dr Sameer Nakedar, MBBS, MRCGP, PGCert

"This panel of tests looks for some common causes of tiredness which can be corrected easily with medication if appropriate.

- Iron studies are checked. If iron stores are low, this can lead to anaemia, amongst other symptoms. If too high, this can also be an issue.

- Low Vitamin D levels can cause tiredness; hence, this is tested.

- Thyroid disorders, particularly an underactive thyroid, can also present with tiredness and are included in this screen.

All of these markers can give a start to some causes of fatigue, which you can tackle early and optimise appropriately with the correct medical help."

Why Take a Tiredness and Fatigue Blood Test

If you have found yourself more tired than usual and cannot easily explain the change due to an increase in activity or lifestyle change, it is important to be tested as the symptoms may be the cause of a change within the body. There are many factors that could account for an increase in tiredness and fatigue, the lack of vitamin D from reduced sun exposure is a large cause within the population for feeling tired. There are several other more serious reasons for feeling tired, including an over or under-acting thyroid, iron deficiency, lack of ferritin production and other impaired protein productions. Taking a Tiredness and Fatigue Blood Test will aid our trained doctors in treatment or lifestyle changes to get you feeling energised and less fatigued. 

of Britons feel tired all of the time
According to the NHS, many adults in the UK struggle from feeling tiredness. A quarter of Britons report feeling tired most of the time while 33% report feeling tired half of the time. Many factors in our lifestyle and our bodies affect how tired we may feel, including diet, exercise, age, gender and pre-existing medical conditions.
of young Britons aged 18-24 are twice as likely to say that tiredness has a great or moderate impact on their work life
The NHS found that those aged between 18-64 find that tiredness impacts their personal life between 34-41% while those aged 64+ find it impacts their personal life by 24%.
Expert’s Opinion

Experts Opinion

"Tiredness can be caused by many factors, some psychological and some medical. Some common reasons for tiredness are nutritional deficiencies, hormone abnormalities, and autoimmune disorders. This panel of tests looks for some common causes of tiredness which can be corrected easily with medication if appropriate."

Dr Sameer Nakedar
Experts Opinion

How to take a home blood test

Collecting a blood sample for your finger prick home test is straightforward. Watch the video below for more details on how to take a home blood test.

  • Pick your home test

    We have a wide range of tests to cover your health needs. Order with next day delivery and avoid sitting in a doctor's office or clinic. Use our quiz to find the right test for you.

  • Take your test

    Activate your test and collect your sample in the morning. Return your sample on the same day, using the prepaid shipping label provided. Samples use a simple finger prick collection method that takes around 5 minutes to complete.

  • Results within 48 hours

    You'll get verified results and insights into what the biomarkers mean. Order now to become a healthier you!

Why Welzo
Convenient and fast
Convenient and fast

Welzo health tests are shipped straight to your address the very next day.

Secure and accurate
Secure and accurate

We are a team of doctors and scientists, making cutting edge analysis accessible.

24/7 Customer Support
24/7 Customer Support

We issue results 24/7, giving you personal insights into your body.

Why Welzo

some title

some text