🧴 Adult Hormonal Acne

What this panel can settle, and by what logic

What this combination establishes is a source, not a diagnosis. Androgen reaching a sebaceous gland can come from the ovary, from the adrenal, from an enzyme block, or from insulin clearing the transport protein out of the way, and those four have four different treatments. The AE-PCOS expert task force recommends measuring total testosterone, free testosterone and DHEA-sulfate by high-quality assays in every woman with adult acne, which is what the first three markers here are Carmina 2022.

1. Free Testosterone read against SHBG (Sex Hormone-Binding Globulin) and Total Testosterone. Two women with an identical total of 40 ng/dL and SHBG of 20 nmol/L against 80 nmol/L are not in the same androgen state, and only the free fraction reaches the follicle. In the pooled diagnostic evidence for biochemical hyperandrogenism, total testosterone and calculated free testosterone carried areas under the curve of 0.87 and 0.85 against 0.77 for DHEA-sulfate Bizuneh 2024, so this pairing is the one doing the work and DHEA-S is the tiebreaker rather than the test.
2. DHEA-S says adrenal or ovarian. DHEA-sulfate is made almost entirely by the adrenal reticularis, so an isolated elevation with a normal free testosterone points away from the ovary and toward a different conversation.
3. 17-OH Progesterone is the only marker here that can change the disease. A 21-hydroxylase block backs the pathway up above the enzyme, and 17-OH progesterone is the substrate that accumulates; it is the marker used both to detect that block and to judge whether treatment for it is adequate Sarafoglou 2023. Non-classic congenital adrenal hyperplasia looks like hormonal acne and is not treated like it.
4. Fasting Insulin with HbA1c (Hemoglobin A1c) and IGF-1 (Insulin-like Growth Factor 1) is the upstream half. Insulin lowers hepatic SHBG output, which raises free testosterone without moving total testosterone at all — the exact pattern that gets a woman told her testosterone is normal. IGF-1 sits beside them because it drives sebaceous output on its own.

Prolactin is the cheap exclusion: it is the one item on this list that costs $9, and a raised value redirects the whole investigation away from the other seven markers.

What it cannot settle, and what would

It cannot tell you whether your acne is hormonal, because that is not a laboratory question. The AE-PCOS committee's first recommendation is that the diagnosis of adult female acne is mainly clinical, with the laboratory work sitting underneath it rather than deciding it Carmina 2022. Jawline distribution and premenstrual flare are dermatological observations. No combination of these eight markers reproduces them.

It cannot predict which treatment will work, and the study that looked hardest found nothing. In 86 women with acne investigated with eleven hormone tests, treatment response did not correlate with hormone concentrations; what predicted failure was a persistent or recurrent course and hirsutism — clinical features again Altunel 2025. Buying this panel to choose between spironolactone and isotretinoin is buying the wrong instrument.

A clean androgen result does not mean clean androgens. In that same series, biochemical hyperandrogenemia was present in 70.9% against clinical signs in 65.1%, and women with no androgenic signs still had it Altunel 2025. Female androgen concentrations also sit where direct immunoassays lose accuracy, which is why the laboratory position statement asks for mass spectrometry at the low end Casals 2023 and why an apparent hyperandrogenemia has been resolved as pure assay interference by LC-MS/MS Huang 2025.

It has no androstenedione on it, and that is a real gap for this question. Androstenedione was the second commonest elevated hormone in that acne series at 40% Altunel 2025, and it is sometimes the only androgen that is raised. It is ordered separately, and its reference interval has to come from the same platform that ran it — a 2023 study exists purely to establish those intervals for women on one analyzer Bokulić 2023.

Draw conditions that decide whether the money is wasted

The instruction that matters most here is not fasting. It is the cycle day, and the reason is 17-OH Progesterone rather than testosterone.

1. Days 2 to 5, because the corpus luteum makes 17-OH progesterone too. After ovulation the luteal 17-OHP rises on its own, so a day-21 draw can put a healthy woman above a follicular-phase cut-off and manufacture a non-classic adrenal hyperplasia she does not have. The interpretive thresholds are written for an early-follicular morning sample and are assay-specific on top of that Sarafoglou 2023. In one acne series 17-OHP was the single commonest elevated hormone, at 65% Altunel 2025 — a rate that should make anybody check the draw day before they accept the result.
2. Before 9am, for the adrenal half. 17-OH progesterone and DHEA-sulfate follow the morning ACTH peak and fall through the day, so an afternoon tube reads a different point on a curve, not a different person.
3. Fast 9 to 12 hours or the Fasting Insulin is decorative. A fed insulin can run several-fold above the fasting value, and the entire SHBG argument on this page depends on the fasting one. HbA1c (Hemoglobin A1c) does not care; the insulin does, and it is the marker that changes what you do next.
4. No biotin for 72 hours. Prolactin and the direct free testosterone method are both streptavidin-based on the common analyzers, so a 10,000 mcg hair supplement can move two of these eight results in opposite directions Li 2020. Hair and skin supplements are exactly what this reader is already taking.

How you would know it answered your question, and what each pattern means next

Five patterns, and the retest interval is set by the skin rather than by the hormone in every one of them: a sebaceous gland cycle takes about 8 weeks, so nothing here is re-read at 4.

• High Free Testosterone, low SHBG (Sex Hormone-Binding Globulin), high Fasting Insulin: the metabolic route. Treat the insulin and recheck SHBG and free testosterone at 12 to 16 weeks — SHBG is a hepatic protein and it moves over months, not weeks.
• Isolated high DHEA-S with a normal free testosterone: adrenal rather than ovarian, and worth a clinician rather than a supplement. A markedly raised value is an imaging question, not a repeat-panel question Bizuneh 2024.
• 17-OH Progesterone raised on a day-3 morning sample: the one result that changes the diagnosis. It needs confirming and often an ACTH stimulation test, because a single basal value cannot settle non-classic adrenal hyperplasia by itself Sarafoglou 2023. Repeating it on a luteal draw is how the finding gets falsely confirmed.
• Everything normal, acne unchanged: the commonest result, and with hyperandrogenemia present in 70.9% of one acne series it is also the one most likely to be a timing artifact rather than a negative Altunel 2025. Check the draw day and the assay before concluding anything, then treat the skin as skin.
• Prolactin raised: repeat it rested before anything else happens, and ask the laboratory to screen for macroprolactin. That is a $9 finding that outranks the other seven markers.

Sources read for these sections

• Carmina E, et al. Female Adult Acne and Androgen Excess: A Report From the Multidisciplinary Androgen Excess and PCOS Committee. Journal of the Endocrine Society 2022 · PMID 35155970
• Altunel CT, Tatlican S. The clinical predictors of biochemical hyperandrogenemia and its relation to treatment resistance in women with acne. Postepy Dermatologii i Alergologii 2025 · PMID 40114774
• Sarafoglou K, et al. Interpretation of Steroid Biomarkers in 21-Hydroxylase Deficiency and Their Use in Disease Management. Journal of Clinical Endocrinology and Metabolism 2023 · PMID 36950738
• Bizuneh AD, et al. Evaluating the diagnostic accuracy of androgen measurement in polycystic ovary syndrome: a systematic review and diagnostic meta-analysis to inform evidence-based guidelines. Human Reproduction Update 2024 · PMID 39305127
• Casals G, et al. Recommendations for the measurement of sexual steroids in clinical practice. A position statement of SEQCML/SEEN/SEEP. Advances in Laboratory Medicine 2023 · PMID 37359897
• Huang D, et al. Apparent Hyperandrogenemia Due to Immunoassay Interference Resolved by Liquid Chromatography-Tandem Mass Spectrometry. JCEM Case Reports 2025 · PMID 40605979
• Bokulić A, et al. Androgens in women: Establishing reference intervals for dehydroepiandrostenedione sulphate and androstenedione on the Roche Cobas. Biochemia Medica 2023 · PMID 37324111
• Li D, Ferguson A, Cervinski MA, Lynch KL, Kyle PB. AACC Guidance Document on Biotin Interference in Laboratory Tests. J Appl Lab Med 2020 · PMID 32445355