Tired All The Time
Unexplained fatigue is one of the most common reasons people seek a blood test. A handful of easily-treatable conditions — iron deficiency, low vitamin D, thyroid problems, and B12 deficiency — account for the majority of cases. These tests tell you exactly what's going on.
Essential tests
Checks for anaemia — low red blood cells are the most common cause of fatigue
from
£23.15
5 providers
Measures your iron stores. You can have normal haemoglobin but depleted iron stores, which still causes exhaustion — especially in women
from
£41.08
5 providers
An underactive thyroid (hypothyroidism) causes profound tiredness, weight gain, and brain fog
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£37.77
5 providers
B12 deficiency causes fatigue, weakness, and poor concentration. Common in vegans and over-50s
from
£22.61
5 providers
Vitamin D deficiency is extremely common in the UK and directly causes fatigue and low mood
from
£43.34
5 providers
Recommended add-ons
Undiagnosed type 2 diabetes causes persistent tiredness and poor concentration
from
£21.47
5 providers
Optional extras
Chronically elevated or depleted cortisol from stress affects energy levels throughout the day
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