Tired All the Time? The Blood Tests That Find Answers

"Tired all the time" is one of the most common reasons people see a GP, and one of the most commonly dismissed. Persistent fatigue is not a character flaw or an inevitability of modern life. It has causes, many of them findable on a blood panel, and most of them treatable.

What we look for

At our Hitchin clinic, a fatigue work-up typically includes:

• Full blood count: anaemia is a classic, under-diagnosed cause
• Iron studies and ferritin: low iron stores cause fatigue long before anaemia appears
• Thyroid function: an underactive thyroid slows everything, energy included
• Vitamin D and B12: deficiencies are common in the UK, especially in winter
• Blood sugar (HbA1c): undiagnosed diabetes and pre-diabetes sap energy
• Kidney and liver function: completing the picture

The consultation matters as much as the tests

Sleep quality, stress, mood, medications, snoring (sleep apnoea is under-diagnosed), and life load all belong in the conversation. Your GP will take a proper history first so the testing is targeted, and interpret results in context, because a 'normal range' number isn't always normal for you.

Results with a plan

Results arrive within days, with a GP summary and a follow-up plan: treat what's found, investigate further if needed, or rule things out so you can address the rest with confidence. That last one is genuinely useful in itself.