The Study
The hypothalamo–pituitary–adrenal axis in chronic fatigue syndrome and fibromyalgia syndrome
This study is like a summary written by an expert who looked at other studies about stress and hormones. It doesn’t do a new experiment or count how many people are affected — it just talks about what others have found, so we can’t be sure what’s really going on.
Analysis score
Maximum 5 for a narrative review.
Where the score came from
Some people with chronic fatigue or fibromyalgia have lower levels of stress hormones. This isn't because their hormone-making parts are broken, but because their body may have changed how it handles long-term stress.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 51 / 100
Quality score
Based on clinical experience or non-systematic literature reviews. The lowest level of evidence as they are most susceptible to bias and personal perspective.
Key takeaways
Summary
Based on the study abstract and findings.
- 1This means the body might be adapting to long stress, not broken, which could help explain ongoing tiredness or pain.
- 2People with chronic fatigue or fibromyalgia often have low cortisol.
- 3Their hormone glands aren't damaged.
- 4Different studies find different results.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Stress
Year
2007
Authors
F. Tanrıverdi, Z. Karaca, K. Unluhizarci, F. Keleştimur
Related Content
Claims (4)
People with chronic fatigue or fibromyalgia often have a sluggish stress-response system and lower-than-normal cortisol levels, but not every study agrees because they look at different people or use different methods.
The way your body handles stress might change in conditions like chronic fatigue and fibromyalgia — and that change could actually be your body trying to cope, not something broken.
People with chronic fatigue or fibromyalgia often have low cortisol, but it's not because their brain or hormone glands are damaged — it's more about how the system is working, not broken parts.
If your body makes too much cortisol for too long, your adrenal glands can get worn out and stop working well when you actually need to handle stress.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.