Women's Health · Hormones

Testosterone in Women: What It Does, Why It Matters, and What Happens When Levels Drop

Testosterone is a natural hormone that both men and women need — for some of the same reasons, and some that are completely different. It's made from cholesterol and belongs to a group of hormones called androgens. While it's often thought of as exclusively male, testosterone plays a meaningful and wide-ranging role in female physiology.

In women, most testosterone comes from the adrenal glands and ovaries, with smaller amounts made in other body tissues from precursor hormones. In the ovaries, much of that testosterone is converted into estradiol — but some remains active and circulates throughout the body, influencing everything from mood and muscle to bone density and libido.

When testosterone levels drop too low, women may notice a lower sex drive, fatigue, mood changes, decreased strength, and an overall dip in quality of life. Understanding what testosterone does — and what drives its decline — is the first step toward addressing it.

What Causes Low Testosterone in Women?

Low testosterone in women is rarely the result of a single cause. It typically reflects a combination of factors that reduce production from the adrenal glands, ovaries, or peripheral tissues.

What Testosterone Does in the Female Body

Testosterone's influence in women spans nearly every major body system. The following is a breakdown of the roles it plays and what research shows about the consequences of deficiency in each area.

Mood, Well-Being, and Motivation

Low testosterone in women is associated with a diminished sense of well-being, dysphoric mood, and loss of motivation. Women with insufficient androgen levels often describe a flattened affect — not quite depression, but a persistent absence of drive and emotional resilience that can significantly affect daily life and relationships.

Energy and Fatigue Resistance

Persistent, unexplained fatigue and lethargy are among the most common signs of low testosterone in women. This is distinct from tiredness caused by poor sleep or overexertion — it is a baseline reduction in available energy that doesn't resolve with rest, and that often goes unrecognized or misattributed to other causes.

Muscle Mass and Physical Strength

Testosterone helps women build and maintain lean muscle and physical strength — even though circulating levels are far lower than in men. Strong muscles protect bones, boost metabolism, and improve endurance. While testosterone does not increase muscle mass in women the way it does in men, adequate levels are still necessary to preserve what's there and support healthy physical function across the lifespan.

Bone Density and Fracture Protection

Testosterone supports bone health and provides meaningful protection against fracture risk. Low testosterone levels in women are associated with a 1% decline in bone density per year — a loss rate that compounds significantly over time and increases vulnerability to osteoporosis and fragility fractures, particularly in the postmenopausal years.

Cognitive Function and Mental Clarity

Some studies suggest that testosterone may help support certain brain functions — including memory and focus — especially in postmenopausal women. The relationship between androgens and cognition in women is an active area of research, with evidence pointing toward a protective role in the maintenance of mental sharpness as estrogen and testosterone levels both decline with age.

Sleep Quality and Recovery

Low testosterone can make it harder to recover from physical activity and may contribute to fatigue and poor-quality, non-restorative sleep. Sleep architecture and hormonal balance are closely linked — disruptions in one often reinforce problems in the other, creating cycles that are difficult to break without addressing the underlying hormonal picture.

Cardiometabolic and Vascular Health

Normal testosterone levels can help keep blood vessels healthy, support good circulation, and maintain healthy inflammation levels. The cardiometabolic consequences of androgen deficiency in women are still being studied, but current evidence suggests that testosterone contributes to vascular tone and metabolic resilience in ways that matter for long-term cardiovascular health.

Reproductive, Sexual, and Blood Health

Important Cautions

Major endocrine societies emphasize that there is no universally accepted lab cutoff or syndrome definition for "androgen deficiency" in healthy women, and they caution against routine supplementation without individualized clinical evaluation. If you suspect low testosterone may be affecting your health, consult with a qualified healthcare practitioner for personalized assessment and guidance.

These statements have not been evaluated by the Food and Drug Administration. This content is intended for educational and informational purposes only and does not constitute medical advice. Always consult a licensed healthcare professional before making any changes to your hormone health regimen or treatment plan.