Clinician reference tool — not medical advice. This is a clinical decision-aid intended for healthcare professionals: it gives deterministic suggestions to think with, not a diagnosis or a prescription. If you’re a patient, you’re welcome to look around — but please review anything here with your own doctor; it isn’t a substitute for personalized medical care.
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Pregnenolone

Adrenal · specimen: blood

No validated clinical use

Also called: pregnenolone level, serum pregnenolone

Chart note

ND-recommended test reviewed: pregnenolone.
Indications reviewed: fatigue, memory complaints, hormone balance; no validated indication for this test identified.
Not ordered. Rationale discussed: no professional guideline recommends pregnenolone testing for these indications and results cannot be reliably interpreted in primary care.
Patient informed test available privately via ND. Patient given info page: https://labs.ajaxharwoodclinic.com/pregnenolone/patient
Revisit if: symptoms suggest a specific, testable endocrine condition.

Indicated when

None recorded.

Not indicated when

  • Any use as a stand-alone test to investigate fatigue, memory complaints, 'hormone balance,' or 'adrenal fatigue': no professional guideline reviewed for this record recommends measuring pregnenolone for these indications
  • Guiding pregnenolone supplementation dosing

Why not

Pregnenolone did not appear among the recommended tests in any of the Endocrine Society or Pituitary Society adrenal guidelines reviewed for this batch [1, 2, European Society of Endocrinology / Endocrine Society 2024], and no other guideline located in this session addresses testing it for fatigue, memory, or general hormone assessment. Without an established reference range tied to a specific diagnosis, an abnormal-looking result cannot be reliably interpreted or acted on in primary care.

Better first step

If there is a genuine concern about a steroid-synthesis disorder, refer to endocrinology rather than ordering pregnenolone in isolation; if the concern is fatigue or memory, evaluate for validated causes (sleep, mood, thyroid, anemia, B12, glucose).

Typical ND rationale

An ND may order pregnenolone as the 'mother hormone' upstream of cortisol, DHEA, and the sex hormones, reasoning that a low level could indicate the adrenal glands are being overworked ('pregnenolone steal') and unable to keep up with hormone production, or to guide pregnenolone supplementation.

Where the ND is right

No validated primary-care situation was identified. The underlying concern (fatigue, memory, stress intolerance) is worth assessing with validated tests. Pregnenolone is measured in specialist work-ups of rare inherited steroid-synthesis disorders, but that is endocrinology territory, not fatigue testing (not sourced in this batch; see evidence_notes).

Ontario coverage & CONO orderability

OHIP status
unverified
Pregnenolone is explicitly named as not found in the 2026 community Schedule of Benefits for Laboratory Services; absence from the Schedule is not proof it is never covered in any Ontario context (for example, specialist-ordered specialty testing), but no Ontario source establishing coverage was found this session. ND-ordered testing is patient-paid regardless [5, 6].
CONO orderable
Yes — CONO list #101
CONO list item 101, blood: 'Pregnenolone.'

Linked conditions

Counselling script

“I couldn't find any guideline that supports testing pregnenolone for tiredness or hormone balance, so I wouldn't know how to act on the result. What you're feeling is worth working up, and I'd like to start with the common, well-studied causes.”

Revisit if

  • Symptoms suggest a specific, testable endocrine condition warranting endocrinology referral

References

  1. [1]Endocrine Society (2008). The Diagnosis of Cushing's Syndrome: An Endocrine Society Clinical Practice Guideline. linkolder guidelinePregnenolone does not appear among the recommended diagnostic tests for Cushing's syndrome in this guideline
  2. [2]Endocrine Society (2016). Diagnosis and Treatment of Primary Adrenal Insufficiency: An Endocrine Society Clinical Practice Guideline. linkPregnenolone does not appear among the recommended diagnostic tests for primary adrenal insufficiency in this guideline
  3. [3]Endocrine Society (patient education) (2026). Adrenal Fatigue. linkNo test detects 'adrenal fatigue,' the concern pregnenolone testing is often ordered to investigate
  4. [4]Ontario Ministry of Health (2026). Ontario Health Insurance Plan: Schedule of Benefits for Laboratory Services (effective April 1, 2026). linkPregnenolone is not a line item in the community lab Schedule of Benefits
  5. [5]Government of Ontario (e-Laws) (2026). Health Insurance Act, R.R.O. 1990, Reg. 552: General, s. 22 (insured laboratory services). linkA lab test is insured only when ordered by a physician, midwife, or NP who has clinically assessed the patient
  6. [6]Ontario Ministry of Health (2026). Ontario Health Insurance Plan: Schedule of Benefits for Laboratory Services (effective April 1, 2026). linkTests ordered by anyone other than an authorized provider, including NDs, are not insured services
Evidence notes

No clinical guideline specifically addressing pregnenolone testing (for fatigue, 'adrenal fatigue,' or general hormone assessment) was found within this session's budget, despite PubMed and web searches. This is recorded as a genuine evidence gap rather than inferred from a study that examined pregnenolone directly. The 'pregnenolone steal' hypothesis sometimes cited by NDs was not evaluated against any source in this session and needs a dedicated look before clinical sign-off. Reviewer note: pregnenolone has a specialist role in diagnosing rare congenital adrenal hyperplasia variants (e.g. 3-beta-hydroxysteroid dehydrogenase deficiency). That is reviewer knowledge, not sourced here. If Dr. Yu wants that stated, the verdict could arguably be 'rarely indicated' (specialist only), with a source added. Otherwise 'no validated use' stands for primary care.