Feeling Constantly Tired? Blood Tests That Can Help Find the Cause
If you’ve been feeling tired for weeks and can’t quite work out why, you’re not alone. Ongoing tiredness can have several possible causes, and a blood test can help narrow down what might be behind it. Low iron, low vitamin D and thyroid problems are among the possible triggers. This guide explains which blood tests are worth considering and how our pharmacy team in Wembley and Stonebridge can help.
Why do I feel tired all the time?
Persistent tiredness can be a sign that something else is going on, rather than simply being the result of a busy week. Common causes include low iron, low vitamin D, thyroid imbalance and poor sleep. Diet, stress and certain long term conditions can also play a part. A blood test can help identify possible causes, rather than leaving you to guess what might be wrong.
Which blood tests can help find the cause of fatigue?
A blood test for fatigue usually checks several markers at once, rather than a single value. This can provide a more useful overall picture of your health. Typical panels include a full blood count, iron studies, vitamin D, thyroid function and blood glucose. Your results, together with your symptoms and medical history, can help guide sensible next steps.
Iron and vitamin D blood tests: why they matter
Low iron and low vitamin D can both be linked with tiredness. An iron and vitamin D blood test checks whether either is running low. Iron deficiency can lead to fatigue, breathlessness and pale skin. Low vitamin D is widespread in the UK, particularly over autumn and winter, and may be associated with low energy and low mood. Correcting a confirmed deficiency, under appropriate guidance, may help you feel better day to day.
What other blood tests may explain low energy?
Thyroid problems and blood sugar imbalances can also cause ongoing tiredness. An underactive thyroid slows the body’s processes and commonly causes fatigue. Blood glucose testing can help identify raised blood sugar and may be used when checking for diabetes or pre diabetes, both of which can be associated with persistent tiredness. Liver and kidney function tests may also be included, depending on your symptoms and medical history.
Private blood tests in Wembley and Stonebridge
Our private blood test service is available at both our Wembley and Stonebridge branches, without needing a GP referral. Samples are taken by a trained phlebotomist, and results are usually available within a few days. This can be a convenient alternative if you do not want to wait for a routine GP appointment or test, and gives you useful information to discuss with your doctor if needed.
Ready to find out what’s behind your tiredness?
If constant tiredness is affecting your day to day life, a blood test could help give you a better idea of what may be causing it. Book a private blood test at our Wembley or Stonebridge pharmacy today. Our team will help you choose a suitable panel based on your symptoms and talk you through your results.
Frequently Asked Questions
What blood test should I have if I’m always tired?
A general fatigue panel, covering full blood count, iron, vitamin D and thyroid function, is a sensible starting point. Your pharmacist can help tailor this to your symptoms.
Can low vitamin D cause tiredness?
Yes, low vitamin D is commonly linked to fatigue, particularly during the UK’s darker winter months. A simple blood test confirms whether your levels are low.
How quickly can I get a private blood test in Wembley?
Appointments are often available within a few days, and results typically follow shortly after. This is usually quicker than routine NHS waiting times for non-urgent tests.
Do I need a GP referral for a private blood test?
No, you can book directly with our pharmacy without a GP referral. We recommend sharing your results with your GP if further investigation is needed.
Is a blood test enough to diagnose the cause of fatigue?
A blood test is a helpful starting point, but it does not replace a full clinical assessment. Persistent or severe tiredness should always be discussed with a doctor.