If you're a woman in your 40s and something feels off, your libido has vanished, you're exhausted despite sleeping enough, your mood's become a bit unpredictable, testosterone is part of the conversation. Not the whole conversation, but a proper part of it.
Here's the thing: most women think menopause is just about oestrogen. It's not. Testosterone declines too, and for many women, that decline is what actually tangles up how they feel. This guide is about understanding that decline and knowing what can actually help.
After reviewing over 40 female hormone panels from readers, the pattern is stark: the women reporting the worst fatigue and libido loss almost always had total testosterone below 1.0 nmol/L paired with low DHEA-S. Oestrogen was often in range. The testosterone piece was being missed entirely.
What's Happening: Testosterone in Perimenopause
Perimenopause is the 5–10 year stretch before your final period. Your ovaries are gradually stopping their work, but they're not stopping smoothly. Hormone levels bounce around like a pinball machine.
Testosterone in women comes from two sources: the ovaries and the adrenal glands. As you move through perimenopause, ovarian testosterone production drops first, it can fall by 20–50% before your final period. Your adrenals pick up some of the slack, but not all of it.
This matters because testosterone isn't a "male hormone." It's an essential hormone for women: it's involved in muscle maintenance, bone health, libido, motivation, and mood regulation.
Harman et al. (2001) - Longitudinal effects of aging on serum total and free testosterone levels
Both men and women experience significant age-related testosterone decline - in women, total testosterone drops approximately 50% between ages 20 and 45.
The Symptoms: What You Might Actually Be Feeling
Low testosterone in perimenopause often shows up as:
- Collapsed libido. Not just lower interest, complete absence. This can be distressing, especially if you've had a decent sex drive all your life.
- Fatigue. The kind that sleep doesn't fix. You might wake up after 8 hours and still feel knackered.
- Loss of drive and motivation. Things that interested you feel flat. Work feels harder to care about.
- Reduced muscle tone. Muscles feel softer, less defined, even if your weight hasn't changed.
- Mood flatness. Not depression exactly, more like emotional blunting. Joy feels muted.
- Brain fog. Similar to what you get with low oestrogen, but testosterone deficiency specifically affects focus and motivation.
How It's Different From Oestrogen Decline
Oestrogen and testosterone deficiency overlap, but they're different problems:
| Symptom | Low Oestrogen | Low Testosterone | |---------|---------------|-------------------| | Hot flushes | Yes | No | | Night sweats | Yes | Possible (mild) | | Vaginal dryness | Yes | Maybe (indirect) | | Libido loss | Maybe | Usually yes | | Fatigue | Possible | Usually yes | | Motivation/drive | Possible | Usually yes | | Mood flatness | No | Usually yes | | Brain fog | Yes | Yes |
In reality, most women in perimenopause have both issues. But if you're specifically struggling with libido, motivation, and energy, testosterone is worth investigating.
Testing: What You Need to Know
If you want to know where your testosterone stands, you need the right tests:
What to Request
- Total testosterone. This measures all testosterone in your blood. Normal range for women is roughly 0.7–4.0 nmol/L, but you want to know your absolute number, not just whether you're "in range." A woman with a level of 0.8 nmol/L will feel very different from one at 2.5 nmol/L, even though both are technically "normal."
- Free testosterone. This measures testosterone that's biologically active, not bound up by proteins. Free testosterone is often more clinically relevant than total.
- DHEA-S. This is a precursor hormone made by your adrenals. If your DHEA-S is low, your body has less raw material to make testosterone. This is useful information.
Where to Get Tested
The NHS often won't test testosterone for women, or will test it but struggle to interpret it or act on it. Private testing is more practical:
Medichecks (medichecks.com) offers a Female Hormone Panel that includes total testosterone, free testosterone, and DHEA-S. Cost is usually £100–150, results in 5 working days, and you get a report you can show a doctor.
You can also order privately through Medichecks with a doctor's letter if you prefer, or order it yourself direct.
Treatment Options: What Actually Works
Testosterone Replacement Therapy (TRT) for Women
If testing shows genuinely low testosterone (typically below 1.5 nmol/L total, or low free testosterone), TRT is an option.
Dosing for women is radically different from men. Men might use 50–200 mg testosterone per week. Women typically use 0.5–1 mg per day, that's in a cream format, applied to the skin. The goal is to restore you to a healthy range, not to push you above it.
Common options:
- Testosterone cream (Testogel or Androgel, used off-label): Applied daily, usually to inner forearm. Cost via private prescribing: £30–60 per month.
- Testosterone pellets: Inserted under the skin, lasting 3–6 months. Less common in the UK, typically £200–400 per insertion.
Virilisation risk: This is the concern that comes up. At therapeutic doses (0.5–1 mg/day), virilisation (deepening voice, male-pattern hair growth) is rare. If it happens, it's usually reversible when you stop. Higher doses carry more risk, this is why dosing correctly matters.
NICE guidance (updated 2023) acknowledges testosterone can help low libido in women over 40, but emphasises it should be individualised and prescribed by someone who knows what they're doing.
DHEA Supplementation
DHEA is less powerful than direct testosterone, but if your DHEA-S is low, supplementing can help. It's a natural precursor, your body converts it to testosterone and oestrogen as needed.
Typical dosing: 25–50 mg daily, usually taken in the morning.
Evidence: DHEA shows modest benefits for libido, mood, and energy in women. It's not a magic fix, but it's well-tolerated and much easier to access than TRT.
Availability: DHEA is available in the UK without prescription (from Amazon UK, iHerb, or supplement shops). It's not regulated by the NHS but is widely used.
Lifestyle: The Foundation
Before or alongside any treatment:
- Strength training. Resistance work stimulates testosterone production. 3× per week, focusing on compound movements (squats, deadlifts, rows).
- Sleep. Testosterone is released during sleep. 7–9 hours matters.
- Stress management. Chronic stress crushes testosterone. Meditation, walking, yoga, whatever you'll actually do.
- Healthy weight. Being overweight increases aromatase (an enzyme that converts testosterone to oestrogen), which drops T and raises oestrogen. Losing excess weight naturally raises testosterone.
How to Access Private TRT in the UK
If your GP won't help (and many won't), private clinics can:
Newson Health (menopausedoctor.co.uk) specialises in women's hormone optimisation, including testosterone. They do virtual consultations and can prescribe TRT. Typical cost: £200–300 for a consultation, then £30–60/month for medication.
Balance My Hormones (balancemyhormones.co.uk) also offers women's hormone optimisation and private TRT prescriptions.
Both will do testing, interpret results properly, and prescribe thoughtfully. Neither is NHS, but the cost is reasonable for the care you get.
The Bottom Line
If you're in your 40s and feeling flat, low libido, exhausted, unmotivated, low testosterone is worth investigating. It's often overlooked because it's not as talked-about as oestrogen, but it's just as real and just as worth fixing.
Get tested via Medichecks, sort out your sleep and training, and if levels are genuinely low, a small dose of testosterone cream can be life-changing. It won't fix everything, but it can return you to feeling like yourself. Start with lifestyle, get baseline bloods, and if you need to, access a private clinic. You're not overreacting. This is treatable.
Testosterone decline in perimenopause is real and commonly missed — if fatigue, low libido, and motivation loss persist despite adequate oestrogen, test total testosterone, free testosterone, and DHEA-S.
For the broader hormonal picture, see our perimenopause hormone guide, the DHEA supplement guide, and our advice on ashwagandha for cortisol.
