You feel exhausted, can hardly get out of bed – but your family doctor says “all values are fine”?
As a GP with a focus on functional diagnostics, I regularly see just such cases in my practice in Zurich Enge. Fatigue is not a “finding”, but a warning signal from the body – often with several hidden causes.
Here are five reasons why you may feel tired even though your standard blood count is normal:
1. iron is “normal”, but not optimal
Ferritin is the iron storage value – and many laboratories classify it as “normal” from 20 µg/l. This is often not enough for energy, concentration and hair health. In women, values below 40-50 µg/l are often too low, although they are not considered a deficiency.
What we do: Determine functional target areas, infusion therapy if necessary.
2. thyroid gland in the border area
TSH is a rough marker. Many patients have TSH values in the upper normal range (e.g. 3.5), but suffer from classic hypothyroidism symptoms. fT3, fT4 and TPO antibodies are often not determined at all.
What we do: Advanced thyroid diagnostics, functional interpretation, not just pathology.
3. stress hormones & adrenal regulation
Chronic stress changes the cortisol rhythm. You can’t see this in the blood count. Many people feel “exhausted in the morning” or have afternoon lows – classic signs of cortisol dysregulation.
What we do: Daily profile via DUTCH test or saliva test, targeted regeneration therapy.
4. mitochondria & NAD⁺ deficiency
Energy production in our cells depends on micronutrients such as B12, CoQ10, magnesium and NAD⁺. A deficiency usually remains undetected in routine laboratories, although those affected experience exhaustion, brain fog and a drop in performance.
What we do: Micronutrient screening, infusion therapy if necessary (B12, NAD⁺).
5. gut health & silent inflammation
The gut is more than just digestion: dysbiosis, leaky gut or histamine problems can drain energy – even without diarrhea or abdominal pain. Silent inflammation (elevated CRP, homocysteine) is also often involved.
What we do: GI-MAP test, nutritional therapy, targeted intestinal reconstruction.
Conclusion
If you feel tired all the time even though your blood values are “normal”, it’s worth having an in-depth, systematic analysis. In my practice, I combine traditional family medicine with modern laboratory diagnostics to get to the root cause – instead of masking symptoms.
