The Claim
The hypothalamo-pituitary-adrenal (HPA) axis is frequently underactive in individuals with chronic fatigue syndrome (CFS) and fibromyalgia syndrome (FMS), as indicated by hypocortisolemia, although study results vary due to differences in methodology and patient selection.
What the research says
Roughly balanced
Support and challenge are close. The picture may shift as more studies come in.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
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.
See the scientific wording
The hypothalamo-pituitary-adrenal (HPA) axis is frequently underactive in individuals with chronic fatigue syndrome (CFS) and fibromyalgia syndrome (FMS), as evidenced by hypocortisolemia, though findings are inconsistent across studies due to methodological and patient selection differences.
What the research says
1 studyStudy: The hypothalamo–pituitary–adrenal axis in chronic fatigue syndrome and fibromyalgia syndrome
The study looks at how the body's stress system works in people with chronic fatigue and fibromyalgia, and finds it's often underactive, just like the claim says. It also explains why some studies might get different results.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.