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The Hidden Causes of Fatigue — It’s Not Just “Being Busy”

 Feeling exhausted? Discover the most common medical causes of fatigue and how a simple blood test can give you clarity and a path forward. 

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The Hidden Causes of Fatigue, It’s Not Just “Being Busy” 

If you’re waking up tired, hitting a mid-afternoon wall or relying on caffeine just to feel functional, there is always a reason. Fatigue is one of the most common symptoms we see and it’s rarely “just life.” 

Your body might be trying to tell you something. 

 

 What Might Be Behind Your Fatigue? 


These are the top contributors we find in midlife clients: 

  • Low B12 or iron affects oxygen delivery and energy 

  • Underactive thyroid, slows metabolism 

  • Blood sugar instability, causes crashes 

  • Chronic inflammation, drains energy 

  • Perimenopause/menopause, impacts sleep and mood 

  • Vitamin D deficiency, surprisingly common in the UK 

You do not need to “push through it.” Fatigue is a solvable problem. 

 

 What Helps Improve Energy Immediately 


  • Eat 20–30g protein at breakfast 

  • Drink water before caffeine 

  • Get daylight within 30 minutes of waking 

  • Prioritise 7–8 hours of sleep 

  • Reduce alcohol and late-night sugar 

Still tired? That’s when testing makes all the difference. 

 

Feeling constantly exhausted? Book a Bristol Health Hub Fatigue Blood Panel and finally understand what your body needs. 

 
 
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