Quick & Dirty: TRT - The good, the bad, and the hairy

In this episode, we take on testosterone, one of the most misunderstood hormones for both women and men. We cover what testosterone actually does, why women have higher absolute levels of it than estrogen across their lifetime, and the role it plays in libido, mood, muscle, bone, and metabolic health.

We also dig into what testosterone is and is not FDA approved for, the difference between physiologic replacement and supraphysiologic dosing, and why so many women feel meaningfully better on testosterone therapy even when it falls outside conventional prescribing guidelines.

If you have wondered whether your fatigue, low drive, mood changes, or loss of strength might be hormonal, this episode is for you.

FAQs

Do women need testosterone?

Yes. Women produce testosterone in the ovaries and adrenal glands, and across the lifetime, women have higher absolute levels of testosterone than estrogen or any other sex hormone. It plays a meaningful role in libido, mood, energy, muscle, bone, and metabolism in women, not only in men.

Is testosterone therapy FDA approved for women?

The only FDA-approved indication for testosterone in women is hypoactive sexual desire disorder (HSDD) in postmenopausal women. Many of the broader benefits women experience on testosterone, including improvements in mood, energy, muscle, and bone, are technically off-label, even when clinically appropriate.

What is the difference between total and free testosterone?

Total testosterone is the full amount circulating in the blood, including the portion bound to proteins. Free testosterone is the unbound, biologically active portion that the body can actually use. Two people with identical total testosterone levels can have very different free testosterone levels and very different symptom profiles, which is why both values are clinically useful.

Will testosterone make a woman bulky or masculine?

At physiologic replacement doses, no. Women do not have the hormonal profile to develop a masculine build from physiologic testosterone replacement. Side effects such as accelerated leg hair growth, mild acne, or a need to shave more frequently can occur in some women, and dosing can be adjusted accordingly. The masculinizing effects associated with testosterone misuse are a feature of supraphysiologic dosing, not physiologic replacement.

Is testosterone replacement appropriate during perimenopause and menopause?

It can be, particularly for women with low libido, fatigue, low mood, or loss of muscle tone that is not adequately addressed by estrogen and progesterone alone. The decision should be made with a clinician experienced in hormone therapy, and dosing should be individualized based on baseline labs, symptoms, and treatment goals.

How is testosterone monitored during therapy?

Through periodic labs assessing total and free testosterone, sex hormone-binding globulin, estradiol (which testosterone can convert into), red blood cell parameters, lipid profile, and other relevant markers depending on the clinical context. Monitoring intervals are typically more frequent at the start of therapy and after dose changes, and less frequent once a stable response is established.

Can lifestyle changes raise testosterone naturally?

Yes, to a meaningful degree. Resistance training, adequate sleep, stress management, weight optimization, blood sugar regulation, sufficient protein and healthy fats, and addressing micronutrient deficiencies (particularly zinc, magnesium, and vitamin D) can all support endogenous testosterone production. For some patients, lifestyle alone is sufficient. For others, lifestyle is foundational but not enough on its own.

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References

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Chapters

00:00 Intro

00:16 What is Testosterone?

00:44 Testosterone in Men and Women

01:26 Production and Feedback Loop

01:46 Role of Testosterone

02:23 Impact on Body and Health

04:12 FDA Approval and Clinical Use

05:41 Balancing Testosterone Levels

06:31 Final Takeaways

06:59 Outro