What Every Woman Should Know About Testosterone and Her Health
When we talk about hormones and women’s health, estrogen and progesterone tend to get most of the attention. Testosterone, on the other hand, is often treated as though it belongs exclusively to men. But here’s what many women don’t realize: your body is designed to make and use testosterone too.
Women produce testosterone throughout our lives, primarily through the ovaries and adrenal glands. We also produce hormones called DHEA and androstenedione, which serve as building blocks for testosterone and other hormones.
Testosterone is not an optional extra in female biology. It interacts with receptors throughout the body, including the brain, muscles, bones, blood vessels, skin and breast tissue, where it can influence how cells function.
And yet, when women begin experiencing changes in their energy, mood, sexual health or physical strength, testosterone is rarely the first hormone anyone discusses.
So what does testosterone actually do? What happens to it as we age? And could it play a bigger role in women’s health than we currently recognize?
Let’s explore what we know, what the research is beginning to uncover, and where we still need better answers.
Your Body Has Testosterone Receptors for a Reason
Hormones act like chemical messengers. They travel through the body and interact with specific receptors on or inside cells, helping regulate different processes. Your body converts some testosterone into other hormones, including estradiol, a type of estrogen. In other words, testosterone doesn't have just one job.
What Happens to Testosterone as Women Age?
Testosterone levels change throughout life. Testosterone concentrations decline starting around age 30, following a very diffeeng pattern than estrogen and progesterone, which tend to decline starting in perimenopause. There isn't a single, universal testosterone “crash” that happens to every woman at menopause.
Surgical removal of the ovaries, certain medical conditions and other factors can also influence androgen production.
As levels change, some women notice differences in sexual desire, physical performance, energy, mental clarity, metabolism, recovery, or their overall sense of well-being.
The challenge is that many symptoms people associate with low testosterone are also associated with other conditions.
Fatigue, for example, can be related to poor sleep, iron deficiency, thyroid dysfunction, menopause, medication effects or a range of other health issues. Brain fog and low mood have similarly complex causes. This is why it is important to look at the whole picture.
Still, the role testosterone plays across the whole body deserves a closer look.
1. Brain Health, Motivation and Mental Clarity
Testosterone receptors are present in brain regions involved in memory, mood, motivation and other aspects of cognitive function.
Researchers are also investigating how testosterone interacts with neurotransmitters, including dopamine. Dopamine helps regulate motivation, reward and the drive to pursue activities.
These biological connections raise interesting questions about how changes in testosterone might relate to the way women feel and function. Sadly, the largest planned studies to investigate these effects have been cancelled due to inadequate funding.
International expert guidance has found insufficient evidence to routinely recommend testosterone for women and no FDA-approved product for women exists at this time.
2. Muscle Health, Strength and Physical Performance
Testosterone is involved in muscle physiology. This is one reason it has received so much attention in research on aging, body composition and physical performance.
In men, randomized trials consistently show increases in lean body mass and reductions in fat mass with treatment. Improvements in muscle strength have been seen in some studies, although they are not consistent across every measure of physical function.
This is an important area of research, especially as we learn more about preserving strength and independence with age.
Again, the bulk of research exists on men and women continue to await better data to drive evidence-based care.
For women who want to maintain muscle as they age, resistance training, adequate protein intake, and quality sleep are critical foundations to build on
3. Bone Health: More Complicated Than One Hormone
Your bones are living tissue. They are constantly being broken down and rebuilt, and several hormones help regulate that process.
Testosterone interacts with bone tissue and may contribute to bone health through direct androgen-receptor activity. Some testosterone is also converted into estradiol, which plays an essential role in regulating bone remodeling and limiting bone loss.
Muscle health matters here, too. Stronger muscles support movement, balance and lower rates of fractures.
During the menopausal transition, declining estrogen accelerates bone loss. Osteoporosis is often called a silent disease because bone loss generally causes no symptoms until a fracture occurs. Hip fractures in elderly women are fatal 20% of the time, and I know from my time in the ER that the percent who survive suffer a greatly reduced quality of life.
While the data doesn’t yet support testosterone as an intervention for bone density, it fits in a treatment plan that prioritizes muscle as the currency of health.
4. The Immune System: An Emerging Area of Research
Immune responses are influenced by sex hormones, and researchers are studying how androgens may affect inflammatory signaling and the activity of different immune cells.
Laboratory and early-stage research has explored pathways involving Th17 cells, which can contribute to inflammation in some autoimmune conditions, and regulatory T cells, which help control immune responses.
These findings raise interesting questions about whether testosterone helps influence the balance between inflammation and immune regulation.
Some observational research has also explored relationships between androgen levels and autoimmune diseases, including rheumatoid arthritis and lupus.
This is an area where better research will valuable, but it is important to distinguish promising biological findings from proven clinical benefits.
5. Testosterone and Breast Health:
This is one of the most interesting areas of testosterone research.
One common concern is that testosterone can be converted into estradiol through a process called aromatization. Because estrogen signaling is relevant to some forms of breast cancer, people understandably ask whether testosterone treatment could increase breast cancer risk.
What a 2026 study found
A study published in March 2026 by researchers at the University of California, examined breast tissue at the single-cell level, comparing tissue from women receiving long-term high-dose (transgender) testosterone therapy with tissue from controls (no testosterone therapy)
The researchers found that blood estradiol levels were similar between the groups. However, breast tissue from participants receiving testosterone showed reduced activity in genes associated with estrogen signaling in certain breast cells, a favorable marker when considering breast cancer. They also found lower expression of progesterone receptors, which can serve as a marker of estrogen activity.
These findings suggest that testosterone may influence estrogen signaling within breast tissue in ways that cannot be understood simply by measuring estrogen in the bloodstream.
Another study, published in 2019, followed 1,267 women who received testosterone pellets. Over the study period, the researchers reported 11 cases of invasive breast cancer, compared with 18 cases expected based on age-specific population rates. This was an observational study, not a randomized clinical trial comparing testosterone with a placebo. Consequently, the study cannot establish that testosterone lowered breast cancer risk but it does help us draw conclusions about safety.
You can read the 10-year testosterone implant study here.
Where does the evidence stand?
International guidelines have concluded that physiologic-dose transdermal testosterone has not shown an increase in breast cancer risk. However, the available randomized trials are not sufficient to determine long-term risk, and there is no established evidence that testosterone prevents breast cancer.
Women with a history of hormone-sensitive breast cancer require particular caution and individualized medical guidance for all hormone related therapies
6. Energy, Recovery and the Benefits Women Are Still Waiting to See Studied Properly
If you search for testosterone research, you will find a substantial body of evidence examining its effects in men.
A major review published in The New England Journal of Medicine in 2025 summarized evidence from men with low testosterone
In this population, testosterone treatment has its most consistent evidence-supported benefits in areas such as sexual function, body composition, bone measurements and certain types of anemia. With some evidence for improving mood, energy and overall vitality.
What about women?
Research in women has examined a number of these outcomes, including bone health, body composition, mood and cognition. The problem is that these studies are generally fewer, smaller
Research in men can help generate hypotheses, but results cannot simply be transferred to women. Hormonal physiology, baseline hormone concentrations, treatment doses and the outcomes being studied all matter.
Is Testosterone Therapy Appropriate for Women Today?
Despite all the areas researchers are exploring, the strongest clinical evidence for testosterone therapy in women concerns one specific condition: hypoactive sexual desire disorder (HSDD) in postmenopausal women.
HSDD describes persistently low sexual desire that causes significant personal distress. It is not simply having less interest in sex than a partner, nor is it defined by a particular testosterone blood-test result.
For other concerns, including fatigue, brain fog, depressed mood, muscle loss, osteoporosis and autoimmune conditions, the evidence is continuing to develop. When systemic testosterone is used at physiologic doses intended to keep levels within the normal premenopausal female range, clinical trials have generally found that the most common androgen-related side effects are mild increases in acne and facial or body hair.
A thoughtful treatment plan should include a discussion of potential benefits, side effects, appropriate laboratory monitoring and a clear plan for evaluating whether treatment is actually helping.
Why Isn't There an FDA-Approved Testosterone Product for Women?
The absence of an FDA-approved female-specific product can be confusing.
It does not mean that testosterone has no role in women's health. It means there is no currently approved testosterone product in the United States specifically indicated for treating women.
The international evidence base supports treatment for postmenopausal women with HSDD, and prescribing guidelines provide recommendations for clinicians managing that condition.
However, the lack of a dedicated product makes correct dosing and monitoring especially important.
Is Testosterone Right for You?
Testosterone is a normal and important part of female physiology. But that does not mean every woman needs testosterone therapy, or that every symptom associated with aging can be treated by replacing it.
The right approach begins with understanding what you are experiencing and why.
When evaluating a woman who is struggling with fatigue, reduced sexual desire, changes in mood, poor sleep or concerns about physical performance, a holistic approach is critical.
That may involve reviewing symptoms and medical history, assessing sleep and stress, reviewing medications, evaluating thyroid function, micronutrients, and metabolic health.
Hormones are one part of a much larger picture.
The goal is to help each patient understand that picture, make informed decisions and choose a treatment plan based on her health, symptoms and priorities, not on a number alone.
The Bottom Line
Testosterone deserves a place in conversations about women's health. It plays a role in female physiology, and research continues to uncover how it interacts with different tissues throughout the body.
We have meaningful evidence that appropriately prescribed testosterone can help some women with distressing low sexual desire. We also have promising biological research in areas such as breast tissue signaling and muscle physiology that deserve further investigation.
Recognizing those limits does not diminish the importance of testosterone. It helps us use the evidence responsibly while asking better questions about what women's health research should investigate next.
Every woman's symptoms, health history and goals are different. Your care should reflect that.
Ready to explore your hormone health?
If you are experiencing changes in sexual desire, persistent fatigue or other symptoms that may be related to hormonal changes, a personalized consultation can help clarify the possible causes and appropriate treatment options.
Together, we can review your symptoms, health history, laboratory findings and goals to determine whether testosterone therapy, or another approach, is the right fit for you.
If you're experiencing symptoms that you suspect may be related to hormonal changes, a consultation can help identify possible causes and determine which treatment options make sense for you, reach out to us or book a complimentary consultation to learn more
