Low Testosterone in Women: The Hormone Nobody Tests For

What testosterone actually does, and it's not what you think

Women make testosterone too. About 5 to 10% of what men do, from ovaries and adrenal glands. It matters. A lot.

It's your muscle builder. You need it to hold onto lean mass and gain strength even when you're training hard. It affects your drive and confidence. It protects your bones. And at the brain level, it tweaks dopamine, the neurotransmitter that makes you feel motivated and rewarded.

When it's low, women describe a loss of push. Not just sexual. Everything feels harder. The gym feels pointless. You can't decide what to do. It's not laziness. It's dopamine depletion.

The problem: doctors don't have a clear threshold for what's "low" in women. They use male ranges or ignore it entirely. That's why it gets missed.

When it starts to fall, and it's earlier than you think

Testosterone peaks in your early 20s, then drops about 0.1% a year. By your 40s, you've lost roughly half of it.

But it's not waiting for menopause. Chronic stress, poor sleep, overtraining. These all elevate cortisol, which tells your adrenal glands to pump the brakes on testosterone. PCOS, thyroid issues, diabetes. All mess with how testosterone moves through your body.

Birth control pills complicate things because they ramp up SHBG, which binds testosterone and makes it inactive. Stop taking them, and you might see a temporary boost, then it settles back down as your ovaries restabilize. Here's the surprise insight: pill users often don't realize they're artificially suppressing testosterone.

And your aging ovaries just make less. The cells that produce testosterone become less responsive to hormonal signals. It happens to everyone, but how fast it happens varies.

Does testosterone therapy work? The real answer

It's emerging. A 2024 review in Andrologia looked at testosterone for low sexual desire in postmenopausal women. The verdict: yes, it helps, especially as a patch or cream at replacement doses, not mega-doses.

But the data pool is small, and long-term safety beyond five years is unclear. Higher doses risk elevated red blood cells, acne, facial hair, voice changes. At physiologic doses (what a younger woman naturally produces), the risks are lower but real.

For other stuff like fatigue, motivation, muscle strength, the evidence is sparse. Some women report feeling better, but we don't have solid RCTs. Your doctor might offer it off-label. Testosterone therapy gets marketed as a cure-all. The research is narrower: it helps sexual function. For fatigue and motivation, the evidence has not caught up.

The UK and New Zealand approved AndroFeme in 2024. Elsewhere, testosterone therapy for women is still mostly off-label and controversial. Not because it's fake, but because there's no standard approach.

What to ask your doctor

If you're experiencing unexplained fatigue, loss of motivation, reduced libido, or loss of muscle despite adequate exercise, ask your doctor to measure your testosterone. Specify: "Can you check my total testosterone and free (unbound) testosterone?" Free testosterone is more biologically active and sometimes more relevant than total.

Ask what the reference range is. Some labs use male ranges; insist on female-specific ranges. A result that's "normal" for a male reference range may be low for you.

If your testosterone is low and you're interested in therapy, ask about transdermal preparations (patches or creams) rather than oral forms, as they provide more stable hormone levels. Discuss realistic expectations: therapy may help libido, energy, or muscle gain, but results vary. Also discuss monitoring: regular checks of hematocrit, lipids, and liver function if long-term therapy is planned.

If your doctor is unfamiliar with testosterone therapy in women, ask for a referral to a menopause specialist or endocrinologist. This is a growing area, and specialists are more likely to have current evidence and experience.