Fatigue & Energy

Feeling constantly tired, lacking motivation, or struggling with low energy can signal an underlying health issue. Our Fatigue and Energy blood tests help identify the root causes of exhaustion, such as vitamin and mineral deficiencies, thyroid disorders, adrenal function, and other imbalances that affect energy levels.

The National Blood Test Clinic offers convenient at-home test kits and in-clinic options across the UK to help you assess whether your fatigue is linked to low iron, B12, vitamin D, thyroid problems, or adrenal stress. Early detection through a fatigue blood test ensures you can take the right steps toward recovery, improved energy, and better overall health.

Frequently Asked Questions (FAQs)

What is the blood test for chronic fatigue?

The best starting point for chronic fatigue is a comprehensive fatigue blood test that checks iron, vitamin B12, vitamin D, thyroid function, and adrenal health. These markers often reveal hidden causes of low energy.

Can vitamin and mineral deficiencies cause fatigue?

Vitamin deficiencies, especially vitamin B12 and vitamin D, as well as folate and iron, are some of the most common reasons for persistent tiredness and low energy. 

What is an adrenal fatigue test?

An adrenal fatigue test measures cortisol levels to assess how well your adrenal glands are functioning. Imbalances in cortisol may contribute to stress, exhaustion, and poor energy regulation.

Are home fatigue tests reliable?

Yes, home blood test kits for fatigue and energy are safe and reliable. They allow you to collect a small blood sample from home and send it to an accredited UK laboratory for analysis.

When should I consider a fatigue blood test?

You should consider testing if you experience ongoing tiredness, poor focus, sleep disturbances, dizziness, or unexplained weakness.