Low Testosterone in Women: The Hidden Cause of Low Libido

When a woman tells her doctor she has low libido, she's often told it's stress, a relationship issue, or just part of aging. What she's rarely offered is a comprehensive hormonal evaluation. And what's almost never tested? Testosterone.

Testosterone is almost exclusively discussed in the context of men, but it is a critically important hormone in women's physiology. Women produce testosterone in their ovaries and adrenal glands throughout their lives, and adequate levels are essential for sexual desire, energy, muscle strength, bone density, and cognitive function. When testosterone declines — which it does naturally with age, but can happen much earlier for other reasons — the effects are real, measurable, and often profoundly impactful on quality of life.

Women Need Testosterone — Here's Why

Testosterone in women functions through androgen receptors found throughout the body, including the brain, muscle, bone, skin, and genitourinary tissue. Its roles include:

• Sexual desire and arousal: Testosterone is the primary biological driver of libido in women, just as it is in men. It sensitizes genital tissue to stimulation and activates reward circuits in the brain associated with sexual motivation.
• Energy and vitality: Adequate testosterone supports mitochondrial function and contributes to the feeling of drive and motivation. Low T is associated with persistent, unexplained fatigue.
• Muscle mass and strength: Testosterone is anabolic — it supports muscle protein synthesis. Low levels contribute to sarcopenia (muscle loss) and reduced exercise capacity.
• Bone density: Both estrogen and testosterone contribute to bone maintenance. Low testosterone is an independent risk factor for osteoporosis.
• Mood and cognition: Testosterone receptors in the hippocampus and prefrontal cortex support memory, focus, and emotional resilience. Low levels are associated with depression, brain fog, and reduced motivation.
• Skin and hair health: Testosterone contributes to skin collagen, elasticity, and thickness. Very low levels can contribute to thinning skin and reduced hair density.

What Are Normal Testosterone Levels in Women?

Female testosterone levels are much lower than men's — approximately 1/10th to 1/20th of male levels — but the absolute amount is significant and its function critical. Normal ranges vary somewhat by lab, but general reference ranges for total testosterone in women are approximately:

• Premenopausal women: 15–70 ng/dL (some labs extend to 80 ng/dL)
• Postmenopausal women: 7–40 ng/dL

However, total testosterone doesn't tell the whole story. Free testosterone — the portion not bound to sex hormone-binding globulin (SHBG) — is the biologically active fraction. A woman can have "normal" total testosterone but very low free testosterone if her SHBG is elevated (which is common in women on oral contraceptives, for example). This is why SHBG levels and free testosterone measurements add important clinical context.

Symptoms of Low Testosterone in Women

The symptoms of low testosterone in women overlap with many other conditions, which contributes to underdiagnosis. Key symptoms include:

Sexual Health

• Low libido — reduced or absent sexual desire, difficulty becoming aroused
• Reduced genital sensitivity and difficulty with orgasm
• Vaginal dryness (often overlapping with estrogen deficiency)
• Decreased frequency of sexual thoughts or fantasies

Physical Symptoms

• Persistent fatigue unrelieved by adequate sleep
• Loss of muscle tone and strength, even with regular exercise
• Increased body fat, particularly in the mid-section
• Reduced exercise tolerance and slower recovery
• Thinning skin, hair loss, or brittle nails

Cognitive and Emotional Symptoms

• Brain fog: difficulty concentrating, word-finding struggles, mental sluggishness
• Reduced motivation and a flattened sense of drive
• Low mood or mild depression that doesn't fully respond to antidepressants
• Diminished sense of wellbeing and confidence

Causes of Low Testosterone in Women

1. Menopause and Perimenopause

Menopause is the most recognized cause of testosterone decline in women, but the decline begins well before the final menstrual period. Testosterone production drops by approximately 50% between a woman's 20s and her late 40s — a gradual decline that accelerates in perimenopause as ovarian function wanes. After surgical menopause (removal of both ovaries), testosterone levels drop suddenly and severely.

2. Oral Contraceptives

This is one of the most clinically underrecognized causes of low female testosterone. Oral contraceptive pills (OCPs) containing synthetic estrogen dramatically increase SHBG production in the liver. Higher SHBG binds more testosterone, reducing the free fraction available to tissues. Women on OCPs can have free testosterone levels 40–60% lower than non-users. For some women, this effect persists even after stopping the pill — sometimes for months or years — due to lasting changes in SHBG regulation.

3. Chronic Stress and HPA Axis Dysregulation

The adrenal glands produce about 25% of women's testosterone (via DHEA conversion). Chronic stress prioritizes cortisol production, often at the expense of adrenal androgen output. Additionally, high cortisol directly suppresses ovarian testosterone production. Women in high-stress phases of life often experience a notable drop in libido that reflects this hormonal shift.

4. Aging

Beyond menopause, testosterone continues to decline with age — this is normal but not inevitable to the extent that it significantly impairs quality of life. By age 60–70, many women have testosterone levels less than half of their peak.

5. Hypopituitarism and Medical Conditions

Conditions that affect pituitary function (which regulates LH and FSH, the hormones that stimulate ovarian testosterone production) can reduce testosterone levels. These include eating disorders, very low body weight, and pituitary tumors or surgeries.

6. Glucocorticoid Use

Long-term use of corticosteroids (prednisone, for example) suppresses adrenal function and reduces DHEA and testosterone production.

How to Test for Low Testosterone in Women

Testing should include:

• Total testosterone: The standard starting point
• Free testosterone (or calculated free testosterone): The biologically active fraction — often more relevant than total levels
• SHBG: Sex hormone-binding globulin — essential for interpreting testosterone levels
• DHEA-S: A precursor to testosterone produced by the adrenal glands; helps identify adrenal contribution
• Full hormone panel: Estradiol, progesterone, FSH, LH, prolactin — to rule out other hormonal contributors

Testing in premenopausal women should ideally be done in the mid-luteal phase (around day 19–21 of a regular cycle) when testosterone is at its monthly peak. A telehealth consultation can help you determine the right timing and panel for your situation.

Treatment Options for Low Testosterone in Women

Low-Dose Testosterone Therapy

Low-dose testosterone therapy in women uses doses approximately 1/10th of those used in men — calibrated to restore levels to the upper-normal female range, not to supraphysiological levels. Forms include:

• Topical testosterone cream or gel: Applied to the inner arm, thigh, or labia. This is the most commonly prescribed form for women; compounding pharmacies can prepare precise low-dose formulations. Absorption and dose accuracy vary between individuals.
• Pellets: Subcutaneous pellets inserted under the skin every 3–6 months, providing stable, consistent hormone delivery. Pellet therapy requires a minor in-office procedure.
• Injectable testosterone: Less common in women due to the difficulty of precise low-dose delivery, but used in some clinical practices.

In the United States, no testosterone product is currently FDA-approved specifically for women. Physicians prescribe commercially available products off-label or use compounded formulations. This off-label use is well-established, evidence-supported, and endorsed by major endocrinological and sexual medicine societies for women with documented testosterone deficiency and symptoms.

DHEA Supplementation

DHEA (dehydroepiandrosterone) is a precursor hormone that the body converts into both testosterone and estrogen. Available over the counter in the US, DHEA supplementation can modestly raise testosterone levels in women with low adrenal androgen production. Typical doses range from 10–25 mg daily for women (much lower than the doses sometimes used in men). DHEA may also be used as intravaginal DHEA (Prasterone/Intrarosa) for genitourinary symptoms associated with menopause — this is FDA-approved.

OTC DHEA quality varies significantly between brands; pharmaceutical-grade or clinician-recommended products are preferable.

Addressing Underlying Causes

When low testosterone is driven by a modifiable cause, addressing that cause should be part of the treatment plan:

• Switching from oral to non-oral contraceptives (patch, ring, or IUD) to reduce SHBG elevation
• Stress reduction and adrenal support to restore DHEA production
• Nutritional optimization, including adequate dietary fat (needed for steroid hormone synthesis) and zinc
• Resistance training, which supports testosterone production through mechanical and hormonal signaling

Safety Considerations

When prescribed and monitored appropriately, low-dose testosterone therapy in women has a strong safety profile. Key considerations:

• Monitoring: Levels should be checked 6–8 weeks after initiation and every 6–12 months thereafter to ensure they remain in the female physiological range.
• Androgenic side effects: At inappropriately high doses, testosterone can cause acne, oily skin, increased body hair, or clitoral enlargement. These effects are dose-dependent and typically reversible.
• Cardiovascular effects: Supraphysiological doses raise cardiovascular concerns, but physiological replacement at female-appropriate doses has not been associated with significant cardiovascular risk.
• Breast cancer: Evidence does not currently indicate that low-dose testosterone therapy increases breast cancer risk; some evidence suggests testosterone may be protective. However, women with active or recent breast cancer should discuss this carefully with their oncologist.

What Truventa Can Help With

If you're experiencing low libido, unexplained fatigue, brain fog, or difficulty maintaining muscle despite regular exercise, it may be time to have your testosterone — alongside your full hormone panel — assessed. Through telehealth, this can happen without a long wait for a specialist appointment.

Truventa Medical's licensed physicians evaluate your complete hormone picture, order appropriate labs, and, if clinically indicated, prescribe individualized hormone therapy — including low-dose testosterone — with ongoing monitoring to keep levels optimized and safe.

Low testosterone is a real, measurable, and treatable condition in women. You don't have to accept diminished desire, persistent fatigue, and cognitive fog as inevitable. The right evaluation and support can help you feel like yourself again.

---

Medical Disclaimer: The information in this article is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Testosterone therapy in women should only be initiated under the supervision of a licensed healthcare provider with appropriate diagnostic testing and ongoing monitoring. Individual hormone levels, symptoms, and treatment responses vary. Truventa Medical connects patients with licensed telehealth physicians who make independent clinical decisions based on individual health profiles.