Testosterone: What It Does and Why It Matters for Men and Women

Many people think of testosterone as the “male hormone.”

In reality, testosterone is important for both men and women.

While men naturally produce much larger amounts, women also rely on testosterone for energy, muscle strength, bone health, mood, cognitive function, and sexual wellbeing.

Like estrogen, testosterone is far more than a reproductive hormone. It acts throughout the body, helping multiple systems communicate and function efficiently. Although menopause receives much more attention, men also experience age-related hormonal changes.

Understanding testosterone helps explain why changes in hormone levels can influence everything from energy and motivation to metabolism, muscle mass, brain function, and healthy aging.

What Is Testosterone?

Testosterone is a hormone produced primarily in the testes in men and the ovaries in women. Smaller amounts are also produced by the adrenal glands.

It belongs to a group of hormones known as androgens and plays an important role throughout life.

Although testosterone is often associated with masculinity, it supports important functions in both sexes.

What Does Testosterone Do?

Testosterone helps support:

• Muscle mass and strength
• Bone density
• Energy production
• Mood and motivation
• Cognitive performance
• Libido and sexual function
• Metabolism
• Red blood cell production

Because testosterone influences so many systems, changes in levels can sometimes affect multiple areas of health at the same time.

Testosterone in Men

Men produce significantly more testosterone than women.

During puberty, testosterone helps drive:

• Growth of muscle and bone
• Deepening of the voice
• Facial and body hair development
• Reproductive development

Throughout adulthood, testosterone continues to support energy, physical performance, metabolism, mood, cognitive function, and sexual health.

From around age 30 onwards, testosterone levels often begin to decline gradually.

For some men, this decline contributes to changes commonly associated with andropause or age-related testosterone decline.

What About Testosterone Replacement Therapy (TRT) For Men

For some men with confirmed testosterone deficiency, a doctor may recommend Testosterone Replacement Therapy (TRT). TRT aims to restore testosterone levels and may help improve symptoms such as low energy, reduced libido, and loss of muscle mass in appropriately selected patients.

However, TRT is not suitable for everyone and requires careful medical supervision. Lifestyle factors such as sleep, exercise, nutrition, and overall metabolic health remain important whether or not TRT is used.

Testosterone in Women

Many people are surprised to learn that women also produce testosterone.

Although levels are much lower than in men, testosterone remains an important hormone throughout a woman’s life.

In women, testosterone helps support:

• Energy levels
• Muscle maintenance
• Bone health
• Libido
• Mood
• Motivation
• Cognitive function

During perimenopause and menopause, testosterone levels may decline alongside estrogen. Although testosterone also declines, estrogen usually falls more sharply, changing the balance between these hormones. This relative increase in androgen activity can contribute to symptoms, such as unwanted facial hair after menopause in some women.

This is one reason some women notice changes in energy, strength, motivation, sexual desire, or overall well-being during midlife.

Can Women Be Prescribed Testosterone?

Yes. Although women produce far less testosterone than men, doctors may sometimes consider testosterone therapy when symptoms such as low libido, reduced energy, loss of muscle mass, or reduced well-being are affecting quality of life.

In some cases, doctors may prescribe testosterone therapy for postmenopausal women, particularly when low sexual desire is causing significant distress. However, treatment is individualized and should always be discussed with a qualified healthcare professional.

Why Testosterone Changes With Age

Hormone production naturally changes as we get older.

In men, testosterone production gradually slows.

In women, both estrogen and testosterone production decline during the menopausal transition.

These changes are a normal part of aging, although the effects vary considerably from person to person.

It’s Not Just About Testosterone

Hormones do not operate in isolation.

Sleep, stress, nutrition, body composition, physical activity, metabolic health, and overall well-being all influence how hormones function.

This is one reason two people with similar hormone levels can feel very different.

The body works as an interconnected system rather than a collection of separate parts.

What Supports Healthy Testosterone Levels?

While aging cannot be stopped, many lifestyle habits help support healthy hormone function in both men and women:

• Resistance training
• Regular physical activity
• Adequate protein intake
• Healthy fats
• Quality sleep
• Stress management
• Maintaining a healthy weight
• Correcting nutrient deficiencies

These habits support overall health, whether you are male or female.

Final Thoughts

Testosterone is often misunderstood.

It is not simply a hormone for muscles, masculinity, or sex drive.

It plays an important role in energy, metabolism, bone strength, mood, brain function, and healthy aging in both men and women.

Understanding how testosterone works helps explain many of the changes people experience during midlife and provides a foundation for making informed decisions about long-term health and wellbeing.