Testosterone in Perimenopause: What the Research Actually Shows

Most conversations about perimenopause focus on oestrogen. The hot flushes, the sleep disruption, the mood swings: these are the symptoms that dominate the literature and the consulting room. But there is another hormonal shift happening in parallel, quieter but no less significant. Testosterone in women begins declining from the early thirties, and by the mid forties, circulating levels may have dropped by up to 50 percent. The symptoms of that decline are real, measurable, and routinely mistaken for something else.

This is not about testosterone replacement or biohacking. It is about understanding a hormone that most perimenopause resources barely mention, and knowing when the research supports action.

If you want a structured twelve week plan that sequences the foundational supplement stack, includes the specific lab tests worth requesting, and walks you through the hormonal picture in clinical detail, that is what The Perimenopause Protocol delivers. For cycle specific support including ovulation tracking as a diagnostic, The Hormone Rebalance Protocol covers the second layer.

What does testosterone do in women?

Testosterone regulates libido, muscle protein synthesis, bone mineral density, red blood cell production, and aspects of cognitive function including motivation and spatial reasoning. Women produce it in three places: the ovaries (roughly 25 percent), the adrenal glands (roughly 25 percent), and peripheral tissues that convert precursors like DHEA and androstenedione (the remaining 50 percent). The total amount in circulation is small compared to men, but the biological effects are not.

In practical terms, testosterone is the hormone behind your drive. Not just sexual drive, though that is the most commonly reported symptom of decline, but the broader sense of vitality, motivation, and physical resilience that women often describe losing during their late thirties and forties without being able to name why.

How does testosterone change during perimenopause?

Testosterone declines gradually from the late twenties, losing roughly 1 to 2 percent per year, a pattern confirmed by Davison and colleagues in a 2005 study published in the Journal of Clinical Endocrinology and Metabolism. Unlike oestrogen, which fluctuates wildly during perimenopause before dropping sharply at menopause, testosterone follows a steady downward slope that begins a decade earlier.

By the mid forties, most women have lost 40 to 50 percent of the testosterone they had at 25. This decline is not triggered by perimenopause itself. It is a separate ageing process that happens to overlap with the oestrogen transition, which is why the symptoms compound. A woman experiencing falling oestrogen and falling testosterone simultaneously will often feel worse than either decline alone would predict.

The adrenal contribution matters here. Chronic stress elevates cortisol, which suppresses DHEA production in the adrenal glands. Since DHEA is the primary precursor to testosterone in women, prolonged stress effectively accelerates testosterone decline. This is one mechanism linking the signs of hormonal imbalance to the broader cortisol picture.

What are the symptoms of low testosterone in women?

Persistent fatigue, reduced libido, difficulty maintaining muscle mass, low mood, brain fog, and joint discomfort are the six most commonly reported symptoms of low testosterone in women. The difficulty is that every one of these also appears in oestrogen decline, thyroid dysfunction, iron deficiency, and depression. Testosterone is rarely the first suspect.

The distinguishing pattern, when it exists, is a specific quality of fatigue and motivation loss. Women with low testosterone often describe feeling flat rather than anxious, unmotivated rather than overwhelmed, and physically weak rather than just tired. Libido loss tends to be the most reliable single marker, not just reduced desire but a complete absence of spontaneous sexual thoughts, which is qualitatively different from the lower libido of general perimenopause.

A 2019 systematic review by Davis and colleagues in The Lancet Diabetes and Endocrinology confirmed that testosterone therapy improved sexual function in postmenopausal women, though it noted insufficient evidence for effects on mood, cognition, or energy. The symptom picture is real; the treatment evidence is still catching up.

How is testosterone tested?

A morning blood draw measuring total testosterone, free testosterone, and DHEA S provides the most useful baseline. Morning testing matters because testosterone peaks in the early hours and declines across the day. Free testosterone (the unbound, biologically active fraction) is often more informative than total, because sex hormone binding globulin (SHBG) rises during perimenopause and can mask true availability.

The Endocrine Society’s 2014 position statement cautioned against diagnosing “androgen deficiency” in women based on testosterone numbers alone, because reference ranges are poorly standardised and symptoms do not correlate neatly with blood levels. The test is a useful data point, not a diagnosis.

In the UK, most standard panels do not include free testosterone. Private panels from providers like Medichecks or Hertility offer more comprehensive hormone profiling. Shop Welzo

Does DHEA raise testosterone in women?

DHEA (dehydroepiandrosterone) is the adrenal precursor that your body converts into both testosterone and oestrogen, and supplementation at 25 to 50mg daily has shown modest benefits for libido and subjective wellbeing in clinical trials. A trial published in the New England Journal of Medicine demonstrated improved sexual function in women with adrenal insufficiency receiving 50mg DHEA daily for four months.

The complication is that DHEA does not convert exclusively to testosterone. Depending on your enzyme profile, a meaningful portion may convert to oestrogen instead, which is not always desirable. Monitoring by a clinician who can check downstream metabolites is important. DHEA is available over the counter in the US but is not licensed as a supplement in the UK, where it is classified as an unlicensed medicine. Self dosing without clinical oversight is not recommended.

For women looking to support the DHEA pathway indirectly, reducing chronic cortisol is the most evidence based approach. Ashwagandha (KSM 66 at 600mg daily) reduced cortisol by 30 percent and increased DHEA S in a 2012 study published in the Indian Journal of Psychological Medicine. Shop Nutravita

Which supplements support testosterone in women?

No over the counter supplement directly raises testosterone in women with the same reliability as pharmaceutical intervention, but several support the hormonal environment in which testosterone is produced. The evidence varies in quality, and expectations should be modest.

• Ashwagandha (KSM 66): The strongest indirect evidence. A 2019 study in Medicine by Lopresti and colleagues found that 300mg twice daily improved testosterone, DHEA S, and sexual function in women reporting low desire. The mechanism is primarily cortisol reduction, which removes the suppressive effect on adrenal androgen production.

• Magnesium: Magnesium is a cofactor in over 300 enzymatic reactions including those involved in sex hormone synthesis. Deficiency is common in women over 35. A study in Biological Trace Element Research found a positive correlation between magnesium status and testosterone levels. The best forms for absorption are glycinate and threonate.

• Maca: A Peruvian root studied primarily for libido. Gonzales and colleagues published a 2002 study in Andrologia showing maca improved sexual desire without altering testosterone or oestrogen levels directly. The mechanism appears to be independent of the hormonal axis, possibly acting on the endocannabinoid system. Worth experimenting with, but not a testosterone intervention per se.

Zinc is a cofactor in testosterone synthesis, and mild deficiency is common in women with plant heavy diets. Supplementing 15 to 30mg daily (as zinc picolinate or bisglycinate) is reasonable if dietary intake is low. Vitamin D status is also consistently linked to testosterone levels in observational research. Supplementing 1000 to 2000 IU daily is sensible for anyone with suboptimal levels, which in the UK includes most people from October to March.

The honest summary: adaptogens and foundational micronutrients create better conditions for testosterone production. They do not replace it. If your levels are genuinely low and symptomatic, these are adjuncts, not solutions.

When to seek clinical help for low testosterone

If you are experiencing persistent fatigue, absent libido, and difficulty maintaining muscle despite consistent strength training and supplementation, and blood work confirms low free testosterone and DHEA S, a conversation with a menopause specialist or endocrinologist is worthwhile.

Testosterone therapy for women exists but remains an off label area in the UK. The British Menopause Society supports its use for hypoactive sexual desire disorder when standard HRT has not resolved symptoms. The typical approach is transdermal testosterone (a gel or cream) at roughly one tenth of the male dose. It is not prescribed routinely, and finding a clinician willing to prescribe requires seeking out a specialist, but the option is real and the evidence base is growing.

What matters most is not rushing to supplementation or therapy, but understanding the picture. Testosterone is one thread in a broader hormonal transition. Addressing it in isolation, without considering oestrogen, progesterone, cortisol, thyroid, and metabolic health, rarely produces the result you want. The women who do best are the ones who get the full panel, understand what each number means, and make informed decisions with a clinician who takes the question seriously.