In brief: Tiredness lasting for weeks should not automatically be blamed on vitamin deficiency, cortisol or “acidity.”
Common causes
| Area | Examples |
|---|---|
| Sleep | Sleep deprivation, sleep apnoea |
| Blood/metabolic | Anaemia, thyroid disease, diabetes |
| Medicines | Sedating drugs |
| Psychological | Depression, anxiety, stress |
Targeted rather than random testing
NHS advises medical assessment when tiredness lasts for weeks or affects daily life.[1]
FAQ
Which vitamins should be tested?
Not all by default.
Does coffee help?
Temporarily, not with the underlying cause.
Can sleep apnoea cause fatigue?
Yes.
When should someone see a doctor?
For persistent tiredness or warning signs.
Conclusion
Persistent tiredness calls for structured cause-focused assessment rather than random supplements.
