Not a diagnosis: a head start. These are the three drivers most worth checking first, based on what the evidence says gets missed most often.
The most missed cause, especially in women. "Normal" on NHS ranges can still be functionally low.
Eight broken hours beat by six deep ones. Snoring or waking unrefreshed points at sleep itself.
Classic, cheap to test, and routinely overlooked when results sit at the edge of range.
Ferritin, TSH + free T4, B12 and folate, vitamin D, HbA1c
1. Start a two-minute note in the free journal that asks back, so the pattern becomes visible.
2. Take the test list above to your GP; the GP Script Generator will help you say it clearly.
3. Read the evidence: Why You're Always Tired: The Blood Tests Your GP Probably Won't Run · Iron Deficiency and Ferritin: Why Normal Can Be Too Low.
Want it tracked and reviewed monthly by a real person? The Club, £10/month.
Education, not diagnosis, and never a replacement for your GP or pharmacist. Reference ranges and guidance vary; sudden, severe or worsening symptoms need 111, or 999 in an emergency. By Hussain Sharifi · independent, affiliate-free health intelligence.