The Cortisol/DHEA Pathway & 'Pregnenolone Steal'
A popular mechanism that is largely a myth
Evidence grade 3 of 5, Mixed. Read how the Atlas grades evidence.
The written rationale for this grade is still being prepared.
- FDA
- Not applicable (physiology)
Reference only. Not medical advice.
This is something to take to a clinician. The Atlas can tell you what is known about the cortisol/dhea pathway & 'pregnenolone steal' in general. It cannot tell you what is happening in your body, and the difference matters most for exactly the symptoms that bring people to this page.
A popular wellness claim holds that chronic stress 'steals' pregnenolone to make cortisol, leaving less for testosterone, the 'pregnenolone steal' or 'cortisol steal.' The endocrinology does not support this literal model: cortisol is made in the adrenal cortex and testosterone mainly in the testes, in separate cells with separately regulated, compartmentalized steroid pools, there is no shared precursor pool to divert. Stress does genuinely suppress testosterone, but through a different mechanism: cortisol and CRH suppress GnRH/LH at the hypothalamus and pituitary, and cortisol directly inhibits Leydig-cell steroidogenesis.
Stress really does lower testosterone, but not by 'stealing' pregnenolone.
What it is invoked to explain
Claims this idea is used to support. Whether it supports them is the rest of the entry.
How it is supposed to work
Steroidogenesis is compartmentalized: adrenal cells and Leydig cells each regulate their own cholesterol-to-steroid flux, so there is no literal diversion of a shared pregnenolone pool. Chronic stress lowers testosterone because sustained cortisol and CRH suppress GnRH pulsatility and pituitary LH, and cortisol directly inhibits testicular steroidogenic enzymes, a regulatory effect, not a substrate-competition effect.
What people get wrong
Often saidStress lowers testosterone by stealing pregnenolone to make cortisol
ActuallyThe 'pregnenolone steal' is not real biochemistry, the tissues and precursor pools are separate. Stress lowers testosterone by suppressing GnRH/LH and Leydig function via cortisol and CRH.
Who profits, and who pushes back
Nobody is named here yet, because we have not done that work on this entry. Read that as unfinished. Somebody almost certainly sells this, and somebody almost certainly disputes it. Assume both until we have checked.
At a glance
- Claim
- Cortisol 'steals' pregnenolone from testosterone
- Reality
- Separate tissues; no shared precursor pool
- Real mechanism
- Cortisol/CRH suppress GnRH/LH and Leydig function
What this entry does not yet cover
What follows is unfinished work on our side, not a finding about The Cortisol/DHEA Pathway & 'Pregnenolone Steal'. A short entry is not a safe entry.
- Timeline. We have not built the dated record of research and regulatory events.
- Cost and market. We have not documented what it sells for or who sells it.
- Supply chain. We have not mapped where it is made.
- Who uses it. We have not documented the user groups.
- What could change. No forward-looking summary yet.
- How it compares. We have not set it against the alternatives.
- Children and teenagers. We have not checked what is known about younger people.
- What can go wrong. We have not written the risk line for this one. Read the safety section below rather than treating its absence as reassurance.
- Where we land. We have not taken a position on this yet.
Sources
No sources recorded for this entry yet. Nothing on this page can be checked against a citation until that changes, so treat it as a summary awaiting its evidence.