Low Libido, Fatigue, and Brain Fog: The Testosterone Deficiency Women Are Rarely Told About
The short version: Testosterone is not just a men's hormone. It is the most abundant biologically active sex hormone across a woman's life, and it falls steadily with age. When that decline drives low sexual desire that is persistent and genuinely distressing, it may be hypoactive sexual desire disorder (HSDD) — the most common female sexual health concern. For postmenopausal women, carefully monitored testosterone therapy is the most evidence-backed treatment available. Low desire that bothers you is a medical issue worth investigating, not a personal failing or an inevitable part of aging.
When women hear the word "hormones," they think estrogen and progesterone. Testosterone almost never enters the conversation — and that omission quietly costs women their energy, their focus, their sense of well-being, and their desire. This is one of the most under-recognized, most treatable problems in women's health, and far too many women are told it is simply stress, aging, or all in their heads.
Here is what the evidence actually says, what a real evaluation looks like, and how to tell whether testosterone is the answer for you — or whether something else is driving how you feel.
Yes, women make testosterone — and yes, it runs low
A woman's ovaries and adrenal glands produce testosterone throughout her life. Levels peak in the twenties and decline steadily from there. Measurable drops in androgen levels can begin before age 40 — often well before any formal menopause diagnosis — so that by her forties a woman typically has roughly half the circulating testosterone she had at her peak.
Some changes are abrupt rather than gradual. Surgical removal of the ovaries causes a sudden fall. And certain medications — including oral estrogen and some hormonal contraceptives — raise a carrier protein called sex hormone-binding globulin (SHBG), which binds up testosterone and lowers the free, active amount your tissues can actually use.
The result is a genuine hormone deficiency that frequently goes unnamed, because both women and their clinicians assume the symptoms are just life. (We go deeper on this in our guide to low testosterone in women.)
What low testosterone can feel like
The symptoms are real but nonspecific, which is exactly why they get dismissed. They commonly include:
● Low sexual desire — fewer sexual thoughts, less interest, reduced spontaneous desire
● Persistent fatigue and low energy that rest doesn't fully fix
● Brain fog — trouble concentrating, mental flatness, slower recall
● A dampened sense of well-being — lower motivation, blunted mood, feeling less like yourself
● Loss of muscle tone and strength despite steady activity
Because these overlap with thyroid disease, depression, perimenopause, poor sleep, and chronic stress, no symptom list can diagnose you. That is a feature, not a flaw — it is precisely why a proper workup matters, and why self-diagnosis is a mistake.
What HSDD actually is
Hypoactive Sexual Desire Disorder (HSDD) is the most common form of female sexual dysfunction, affecting an estimated one in ten adult women. It is defined as a persistent or recurrent absence of sexual thoughts, fantasies, or desire for sexual activity that causes personal distress and is not better explained by another medical condition, a medication, or a relationship problem.
That word — distress — is the heart of the diagnosis. Low desire only qualifies as HSDD when it genuinely bothers the woman experiencing it. If your desire has changed and it doesn't trouble you, that is simply your normal. HSDD is a real, diagnosable medical condition — not a character flaw, not a relationship failure, and not something you should have to explain away.
How is HSDD identified? The 5-question screener
Because HSDD is so under-recognized, clinicians use a brief, validated tool called the Decreased Sexual Desire Screener (DSDS). It is a short set of questions your provider reviews with you, covering four simple points and one broader check:
● Was your level of sexual desire previously good and satisfying to you?
● Has it noticeably decreased?
● Does that decrease bother you?
● Would you like it to increase?
● Are other factors possibly contributing — a medical condition, surgery, medications, alcohol, pregnancy or menopause symptoms, pain or arousal problems, a partner's sexual concerns, relationship dissatisfaction, or stress and fatigue?
If the first four point toward decreased, distressing desire and no other factor is clearly responsible, the screen suggests generalized, acquired HSDD. If a contributing factor is present, that doesn't rule HSDD out — it just means your clinician has to weigh whether that factor is the true driver. The screener is a starting point for a conversation, not a substitute for a full evaluation.
Does testosterone therapy actually work?
For postmenopausal women who meet the criteria for HSDD, the evidence is unusually clear. In 2019, the Global Consensus Position Statement on the Use of Testosterone Therapy for Women — authored by an international expert panel and endorsed by the International Society for the Study of Women's Sexual Health (ISSWSH), the Endocrine Society, and ten other medical societies — concluded that the one evidence-based indication for testosterone in women is the treatment of HSDD in postmenopausal women.
That conclusion rests on real data. A 2019 systematic review and meta-analysis in The Lancet Diabetes & Endocrinology pooled 36 randomized controlled trials covering more than 8,000 women and found a moderate but meaningful improvement in sexual desire, arousal, orgasm, and pleasure, along with a reduction in distress. In 2021, ISSWSH published a dedicated clinical practice guideline detailing exactly how to select patients, test, dose, and monitor.
One honest note of precision — and it's a mark of a serious clinic rather than a marketing mill: the strongest evidence is in postmenopausal women, and the benefit is moderate, not miraculous. Testosterone is a meaningful tool for the right person, not a cure-all for everyone.
Is it safe — and why isn't there an FDA-approved product for women?
Here is the part most clinics gloss over: in the United States, there is currently no FDA-approved testosterone product designed for women (Australia is the rare exception). This is a regulatory gap, not a verdict on the science.
Because of that gap, responsible clinicians prescribe FDA-approved male formulations at a fraction of the male dose — roughly one-tenth — carefully titrated to keep blood levels within the normal premenopausal female range. This off-label prescribing is legal, common, and standard in expert hands. In clinical trials, testosterone given at these physiologic doses was not associated with serious adverse events. Transdermal delivery (a low-dose cream or gel) is preferred; pellets, injections, and oral testosterone are generally discouraged because they tend to push levels too high.
The genuine limits worth knowing: robust long-term safety data beyond about two years are still limited, and because testosterone for women isn't FDA-approved, insurance often won't cover the medication. That is exactly why monitoring is non-negotiable — baseline labs, follow-up labs, and ongoing symptom tracking rather than a set-it-and-forget-it pellet.
The regulatory climate is shifting, too. In late 2025 and early 2026, the FDA moved to remove long-standing boxed warnings from menopausal hormone therapy products, reframing treatment as an individualized decision between patient and provider. That change focused on estrogen products — a women's testosterone product still isn't approved — but it reflects a broader, overdue rethinking of how women's hormone health is treated.
What good treatment actually looks like
Done correctly, testosterone therapy for HSDD is a careful, monitored process — not a prescription handed out on a first visit:
● A full evaluation first, including your history, symptoms, and what else might be driving how you feel
● Baseline bloodwork — total testosterone, SHBG, and related labs — before starting anything
● Ruling out other causes such as thyroid disease, depression, or medication side effects
● Physiologic, transdermal dosing titrated to keep you within the normal premenopausal range
● Follow-up labs and symptom tracking with dose adjustments over time, plus attention to side effects
If a provider offers testosterone without labs, without follow-up, or as a one-size-fits-all pellet, that is a red flag — not a shortcut. You can see how we approach women's hormone care on our service page.
When testosterone is not the answer
This is where expertise earns its keep. Testosterone will not fix low desire that is actually caused by something else, and a good clinician rules those things in or out first:
● Relationship conflict or dissatisfaction
● Untreated depression or anxiety
● Thyroid disease or other unmanaged medical conditions
● The side effects of another medication — including some antidepressants and hormonal contraceptives
● Menopausal changes like painful sex or vaginal dryness, which have their own targeted treatments
● Chronic stress and sleep deprivation
Because so many things can look like low testosterone, self-diagnosis and unregulated online products or unmonitored pellets are genuinely risky. A thorough workup is what protects you.
You deserve to be taken seriously
If your desire has faded, if it bothers you, and if you've been told it's just part of getting older — that answer is incomplete. Low testosterone is a legitimate, measurable, and often treatable cause, and you deserve a clinician who will actually investigate it rather than wave it off.
At HomeSteady Health in Trumansburg — just minutes from Ithaca — we provide comprehensive hormone evaluation for women, including the assessment and evidence-based treatment of HSDD, with real lab testing and real follow-up. You get one experienced provider who knows your name and follows your case start to finish.
Ready to get answers? Schedule a consultation with HomeSteady Health to have your hormone levels tested and your symptoms taken seriously. Serving Trumansburg, Ithaca, and the greater Finger Lakes. Call or book online at homesteadyhealth.com/contact.
About the author
Matthew Simone, FNP-BC, is the founder of HomeSteady Health and a board-certified Family Nurse Practitioner with more than 25 years across family medicine, emergency, and urgent care. He was named Nurse Practitioner of the Year in 2025 and serves as President of Region 2 of the Nurse Practitioner Association of New York. Based in Trumansburg, he lives the active Finger Lakes lifestyle and built HomeSteady Health to practice medicine the way it should be — unhurried, continuous, and centered on the patient in front of him.
Frequently asked questions
Is testosterone a male hormone?
No. Testosterone is active in women throughout life and is, in fact, the most abundant biologically active sex hormone across a woman's lifespan. Levels peak in the twenties and decline with age.
Can low testosterone cause low libido in women?
It can be a contributing factor. When low desire is persistent and genuinely distressing, and other causes have been ruled out, it may be hypoactive sexual desire disorder (HSDD) — for which testosterone therapy is the most evidence-based treatment in postmenopausal women.
Is testosterone therapy for women FDA-approved?
There is no FDA-approved testosterone product designed specifically for women in the U.S. Clinicians prescribe low, physiologic doses of approved male formulations off-label — a legal, common, and evidence-supported practice for postmenopausal HSDD when done with proper testing and monitoring.
Does testosterone therapy actually work?
For postmenopausal women with HSDD, a meta-analysis of 36 randomized trials found a moderate, meaningful improvement in desire, arousal, orgasm, and pleasure, along with reduced distress. It is a real tool for the right patient, not a cure-all.
Is it safe?
At physiologic doses, testosterone was not associated with serious adverse events in clinical trials. Long-term safety data beyond about two years remain limited, so baseline labs, follow-up labs, and ongoing monitoring are essential.
How do I get evaluated near Ithaca?
HomeSteady Health in Trumansburg, minutes from Ithaca, offers hormone evaluation for women — including HSDD assessment, lab testing, and evidence-based treatment. Book a consultation at homesteadyhealth.com/contact.
Key clinical sources
Davis SR, Baber R, Panay N, et al. Global Consensus Position Statement on the Use of Testosterone Therapy for Women. J Clin Endocrinol Metab. 2019;104(10):4660–4666.
Islam RM, Bell RJ, Green S, et al. Safety and efficacy of testosterone for women: a systematic review and meta-analysis of randomised controlled trial data. Lancet Diabetes Endocrinol. 2019;7(10):754–766.
Parish SJ, Simon JA, Davis SR, et al. ISSWSH Clinical Practice Guideline for the Use of Systemic Testosterone for Hypoactive Sexual Desire Disorder in Women. J Sex Med. 2021;18(5):849–867.
Parish SJ, Kling JM. Testosterone Use for Hypoactive Sexual Desire Disorder in Postmenopausal Women (Practice Pearl). The Menopause Society. Menopause. 2023;30(7):781–783.
Disclaimer: This article is for educational purposes only and is not medical advice, diagnosis, or treatment. It is not a substitute for consultation with a qualified healthcare provider, and reading it does not establish a provider-patient relationship with HomeSteady Health. Testosterone therapy carries individual risks and benefits; decisions should be made together with your own clinician.