Investigating Persistent Adult Acne and Hirsutism: Targeted Androgen and Metabolic Profiles

Introduction

Persistent adult acne and hirsutism — the growth of coarse, dark hair in areas typically sensitive to androgens — are concerns that bring many adults to seek medical advice. Both symptoms can sometimes be associated with elevated androgen activity or an underlying endocrine condition, yet neither symptom on its own confirms a hormonal disorder. This article explains the possible role of targeted androgen and metabolic blood tests, the conditions they may help to investigate, and the important limits of testing without appropriate clinical assessment.

What Can Persistent Adult Acne and Hirsutism Indicate?

Adult acne affects a significant proportion of adults beyond their teenage years, with hormonal fluctuations, comedogenic products, medication effects and other dermatological conditions all recognised as possible contributing factors. It is important to distinguish common adult acne from rarer inflammatory conditions, and to appreciate that not every person with breakouts has a detectable hormonal abnormality.

Hirsutism refers specifically to excess terminal hair growth in a distribution typically associated with androgen sensitivity — for example, the chin, upper lip, chest, abdomen or inner thighs — and should be distinguished from hypertrichosis, which is a generalised increase in hair growth unrelated to androgen stimulation. Hirsutism in women can result from polycystic ovary syndrome (PCOS), other endocrine conditions such as congenital adrenal hyperplasia or, less commonly, androgen-secreting tumours. In a notable proportion of cases, no underlying cause is identified, and the condition is classified as idiopathic.

PCOS is one of the more common endocrine conditions in women of reproductive age, but acne and unwanted hair growth do not automatically indicate PCOS. Assessment requires consideration of symptoms, menstrual history, clinical examination and appropriate investigation.

When Should Hormonal Testing Be Considered?

Hormonal testing is not indicated for every adult with acne or mild unwanted facial hair. A healthcare professional is best placed to assess whether testing is appropriate based on symptom pattern, medical history and examination findings.

Investigations may be considered when acne is persistent, treatment-resistant or associated with other features that suggest possible androgen excess — such as irregular or absent menstrual cycles, unexplained weight changes or scalp hair thinning. Similarly, hirsutism that is progressive, moderate to severe, or accompanied by other clinical features may warrant investigation to identify or exclude an underlying cause.

Which Androgen Blood Tests May Be Relevant?

When androgen excess is clinically suspected, targeted blood tests can provide useful information. The following investigations are among those that may be considered, depending on individual circumstances:

Total testosterone is often measured as an initial assessment of circulating androgen levels, and a total testosterone blood test is widely available privately. However, total testosterone alone may not fully reflect androgen activity at the tissue level, because a significant proportion of testosterone circulates bound to sex hormone-binding globulin (SHBG) and is not biologically active in the same way as unbound testosterone.

Sex hormone-binding globulin (SHBG) is a protein that binds to sex hormones, including testosterone, in the bloodstream. Low SHBG can increase the proportion of free, biologically active testosterone even when total testosterone appears within a normal reference range. Measuring sex hormone-binding globulin alongside testosterone allows calculation of a free androgen index (FAI) or estimated free testosterone, providing a more complete picture of androgen status.

DHEAS (dehydroepiandrosterone sulphate) is an adrenal androgen that may be measured when there is clinical reason to investigate adrenal androgen production — for example, when other androgen markers are at the upper end of normal, or when clinical features suggest a possible adrenal source.

Interpretation depends on the assay method used, the laboratory's specific reference ranges, the phase of the menstrual cycle where relevant, and any medicines being taken. Hormonal contraceptives, in particular, significantly affect SHBG and testosterone levels and must be taken into account when evaluating results.

Those wishing to explore private androgen testing options can review a combined female hormone profile blood panel offered by separate providers.

Why Might Metabolic Testing Be Considered?

When PCOS or a related metabolic risk is suspected, investigations may extend beyond androgen markers to include metabolic assessment. This reflects the established association between PCOS and an increased risk of insulin resistance, impaired glucose regulation and adverse lipid profiles in some individuals — though these associations vary considerably between people.

Glycaemic assessment — which may include HbA1c or fasting glucose depending on clinical circumstances and current guidance — can help evaluate glucose regulation. Lipid profile testing may be considered to assess cardiovascular risk where relevant.

It is important to note that not every person with acne or hirsutism requires a full metabolic panel. The decision to include metabolic investigations should be based on individual clinical risk, symptom profile and professional judgement, rather than applied as a universal checklist.

Those interested in what a metabolic syndrome blood test profile might include can consult independent providers for their current test offerings and sample requirements.

How Are Results Interpreted?

Laboratory reference ranges vary between assay methods and testing facilities, and a result described as within range at one laboratory may fall outside the range used at another. This makes it particularly important that results are not assessed in isolation.

A result at the upper end of a reference range may be clinically significant in the presence of relevant symptoms, or entirely unremarkable in someone with no associated features. Equally, a result within the normal range does not necessarily exclude a hormonal contribution to symptoms. Medications — particularly combined oral contraceptives — significantly alter SHBG, total testosterone and other hormone measurements and must be taken into account during interpretation.

Results from a private blood test are most useful when reviewed alongside a detailed symptom history and relevant clinical findings by an appropriately qualified healthcare professional.

How Should You Prepare for Testing?

Preparation requirements vary according to the specific tests ordered and the instructions provided by the testing laboratory. General points that may be relevant include:

Disclaimer

This article is for general educational purposes only and is not a diagnosis or personalised medical advice. Symptoms, risks, and test suitability vary by individual and should be assessed by a qualified clinician. Seek urgent care or call 999 for severe or rapidly worsening symptoms.

Written Date: 26 October 2026 | Next Review Date: 26 October 2027