What can the Tiredness & Low Energy Blood Test tell me?

This test panel can tell you if you have markers in the blood of a number of important and/or common conditions that can cause tiredness and fatigue. Positive results can indicate a disease that may require treatment. Negative results make it much less likely that you have a disease causing your symptoms and that you may benefit more from changes to your lifestyle involving sleep, diet and exercise.

Who should not use the Tiredness & Low Energy Blood Test?

We do not recommend using this test panel if you: are a child (17 years or under) are pregnant are feeling acutely unwell - e.g. with a cold or flu or if you have new-onset (i.e. within the last few days) symptoms of fatigue. It's often worth giving the body a chance to sort itself out before jumping to tests. If you already have a known medical condition that affects your energy then this test kit may not be useful. If you're not sure if you should use this test panel, please contact us for advice.

Tiredness & Low Energy Blood Test

Tired all the time? We’ll help you find out why by testing for common causes with our comprehensive blood test panel.

Results and doctor's report in 2 days or less
Free, next-working day delivery

£75.00

Personalise your Tiredness & Low Energy Blood Test

You can choose how you'd like to collect your blood sample.

Choose how to collect your blood sample

Finger-prick blood collection

Free

Use our simple kit to collect a blood sample from your finger at home.

Visit a clinic to have your blood taken

£35.00

Book a venous draw at home or work with a nurse

£70.00

Arrange your own venous blood draw

Free

Dr Claire Merrifield

GP, PhD and our Medical Director

What you need to know about our Tiredness & Low Energy Blood Test

Dr Claire Merrifield

GP, PhD and our Medical Director

Feeling tired all the time can really stop you living your life to the fullest. Often low energy is caused by the stresses and strains of daily life, but other times it can be a sign that something’s not quite right with your body. Our Tiredness and Low Energy Blood Test panel includes blood tests for the common causes of low energy and fatigue such as:

Thyroid problems
Low iron & vitamin levels
Kidney problems
Inflammation

Whether we pick up a specific problem or rule out the major medical causes of tiredness, you’ve taken a key step to getting on top of your tiredness and fatigue.

What's tested in your Tiredness & Low Energy Blood Test?

Thyroid Health
Thyroid disease is one of the commonest autoimmune conditions in the UK and tiredness can be the only symptom.
WHAT'S MEASURED?
- Thyroid stimulating hormone (TSH) stimulates the thyroid gland to make thyroid hormones. A low TSH indicates an overactive thyroid while a high TSH indicates an underactive thyroid.
Kidney Health
Problems with your kidneys will cause tiredness as your body can't filter waste from your blood as well as it should.
WHAT'S MEASURED?
- Creatinine is a biomarker of how well your kidneys are working.
- eGFR is a biomarker that's calculated from your creatinine. It provides a more accurate measurement of your kidney function that takes into account your age and biologic sex. The higher the eGFR the better your kidney function. An eGFR of '>90' is as high as the scale goes and indicates normal kidney function.
Low Vitamins
Tiredness is often an early sign of vitamin deficiency. You're at higher risk of vitamin deficiency if you're on a vegan or plant-based diet and all of us are at high risk of vitamin D deficiency in the UK.
WHAT'S MEASURED?
- Vitamin D controls calcium levels and is important for the immune system and bone health.
- Vitamin B12 is essential for your body to make DNA and is particularly important for your blood cells and nerves. Low levels can cause anaemia as well as tingling and numbness.
Iron Deficiency
Iron deficiency is probably the commonest medical cause of tiredness. Fortunately, it's simple to test for and easy to fix.
WHAT'S MEASURED?
- Ferritin is a biomarker of the levels of iron in the body. Iron deficiency causes anaemia and tiredness.
Inflammation Status
Inflammation in your body will make you feel tired and wiped out. You may also have other symptoms in your gut or joints.
WHAT'S MEASURED?
- C-reactive protein is released by the liver in response to infection or inflammation.

Find out more about the role of testing in fatigue

: This test panel can tell you if you have markers in the blood of a number of important and/or common conditions that can cause tiredness and fatigue. Positive results can indicate a disease that may require treatment. Negative results make it much less likely that you have a disease causing your symptoms and that you may benefit more from changes to your lifestyle involving sleep, diet and exercise.
: We do not recommend using this test panel if you:

are a child (17 years or under)

are pregnant

are feeling acutely unwell - e.g. with a cold or flu or if you have new-onset (i.e. within the last few days) symptoms of fatigue. It's often worth giving the body a chance to sort itself out before jumping to tests.

If you already have a known medical condition that affects your energy then this test kit may not be useful.

If you're not sure if you should use this test panel, please contact us for advice.