Today’s Quick Hits episode is all about testosterone, libido, hair loss, and the frustrating reality that sometimes the very hormone helping one symptom can stir up another.

Because apparently, midlife hormones like to keep things interesting.

James O’Hara is a family nurse practitioner who uses an integrative approach to health, combining lifestyle interventions, targeted supplementation, and prescription medications when appropriate. His goal is to help patients feel better now while also supporting a longer, healthier life.

In this episode, James and I are talking about testosterone replacement therapy for women, including the benefits and potential drawbacks that can come with it during perimenopause and menopause.

Testosterone can be incredibly helpful for libido, energy, mood, motivation, muscle health, cognitive function, and overall vitality. But it can also contribute to issues such as acne, unwanted hair growth, and hair thinning, particularly in women who are genetically more sensitive to androgens.

And as we discuss in this episode, sexual health is rarely about testosterone alone.

Estradiol, progesterone, dopamine, cardiovascular health, blood flow, stress, sleep, thyroid function, genetics, and even ferritin levels can all influence how a woman feels and responds to treatment.

We also get into the different options available for managing DHT-related hair loss, including natural DHT blockers, prescription medications, oral minoxidil, copper peptides, and other supportive therapies.

Because simply stopping testosterone is not always the best answer, especially when it is helping a woman feel dramatically better in every other area of her life.

This conversation is a great example of why women need individualized hormone care. There is no single hormone dose, supplement, or medication that works perfectly for every woman. The goal is to look at the whole picture, weigh the benefits against the side effects, and build a plan that actually makes sense for the person sitting in front of you.

In This Episode, We Discuss:

• Why testosterone therapy can improve libido while also contributing to hair thinning in some women

• How testosterone, estradiol, progesterone, and dopamine work together to influence sexual health

• Why androgens such as testosterone and DHT may increase libido through their effects on dopamine

• How genetic sensitivity to androgens can shape a woman’s response to testosterone therapy

• Why natural and pharmaceutical 5-alpha-reductase inhibitors may help manage DHT levels

• How cardiovascular health, circulation, and blood flow affect female sexual wellness

• Why supplements such as citrulline may support blood flow and sexual function

• How peptides such as PT-141 and Melanotan may influence sex drive and overall health

• Why melanocortin receptors may help explain the connection between sunlight exposure and sexual desire

• How early-onset hair loss in women may be connected to genetics, chronic stress, and hormonal changes

• Why ferritin levels and thyroid function are essential considerations when evaluating hair loss

• How treatments such as dutasteride and oral minoxidil may help address androgen-related hair thinning

• Why patience matters when using hair-loss medications and which potential side effects to consider

• How herbal DHT blockers, copper peptides, and other supportive treatments may improve hair health

• Why combining functional and conventional medicine can create more personalized and effective treatment plans

• How lifestyle changes, supplementation, and prescription medications can work together to optimize care

Why Testosterone Matters for Women in Perimenopause and Menopause

Testosterone is not just a male hormone.

Women need testosterone too.

In women, testosterone can support libido, arousal, orgasm, energy, motivation, muscle, mood, confidence, and cognitive function. During perimenopause and menopause, testosterone levels may decline or become less available, which can contribute to low libido, fatigue, reduced drive, loss of muscle, lower motivation, and feeling less like yourself.

For some women, testosterone therapy can be a game changer.

But like every hormone, dose, delivery method, genetics, and monitoring matter.

Too little may not help. Too much may cause side effects. And even a “normal” dose can affect women differently depending on androgen sensitivity, thyroid status, ferritin levels, SHBG, inflammation, stress, and overall hormone balance.

Can Testosterone Cause Hair Loss in Women?

Testosterone therapy may contribute to hair thinning in some women, especially if they are genetically sensitive to androgens or convert more testosterone into DHT, also known as dihydrotestosterone.

DHT is a more potent androgen that can affect hair follicles in women who are prone to androgen-related hair loss.

This does not mean every woman on testosterone will lose hair. Many women do beautifully on testosterone and never experience hair thinning.

But if hair shedding starts after beginning or increasing testosterone, it is worth looking at the bigger picture, including:

• Testosterone dose

• Free testosterone

• DHT levels

• SHBG

• Ferritin and iron status

• Thyroid function

• Stress and cortisol

• Nutrient status

• Genetics

• Hair loss history

• Medication changes

• Recent illness or major weight loss

Hair loss is almost never about one thing.

Annoying? Yes. But also true.

DHT, 5-Alpha-Reductase and Hair Thinning

One of the key pathways discussed in this episode is the conversion of testosterone into DHT through an enzyme called 5-alpha-reductase.

Some women may have higher 5-alpha-reductase activity or be more sensitive to DHT at the hair follicle level. This can make them more prone to androgen-related hair thinning, especially at the temples, part line, or crown.

This is where natural and pharmaceutical DHT-blocking strategies may be considered.

Options discussed include herbal DHT blockers, 5-alpha-reductase inhibitors such as dutasteride, oral minoxidil, copper peptides, and other supportive therapies.

The right approach depends on symptoms, labs, health history, side effects, goals, and whether testosterone is providing significant benefits in other areas.

Why Libido Is Not Just About Testosterone

Low libido in perimenopause and menopause is rarely about one hormone.

Testosterone can be important, but female sexual wellness also involves estradiol, progesterone, dopamine, thyroid function, blood flow, cardiovascular health, stress, sleep, vaginal tissue health, relationship dynamics, body image, nervous system regulation, and overall vitality.

This is why some women increase testosterone and still do not feel the sexual desire they expected.

And it is also why some women improve libido when they support estrogen, dopamine, thyroid, sleep, blood flow, or vaginal health.

Sexual desire is not just a lab value. It is an entire ecosystem.

Blood Flow, Citrulline and Female Sexual Wellness

Blood flow matters for female sexual function.

Arousal, sensation, lubrication, and orgasm all rely partly on healthy circulation and vascular function. This is why cardiovascular health, nitric oxide support, exercise, and metabolic health can all influence sexual wellness.

James discusses how supplements such as citrulline may support nitric oxide and blood flow, which may help some women with arousal and sexual response.

Again, this does not replace hormone optimization, but it can be part of the bigger picture.

PT-141, Melanotan and Peptides for Libido

This episode also touches on peptides such as PT-141 and Melanotan, which may influence sexual desire through melanocortin pathways.

PT-141, also known as bremelanotide, is sometimes discussed for low sexual desire because it works more centrally through the brain and nervous system rather than only through hormones or blood flow.

This is a more advanced conversation and should be approached with proper guidance, especially because peptides are not appropriate for everyone.

This Episode Is For You If:

• You are curious about testosterone therapy for women

• You are in perimenopause or menopause and struggling with low libido

• Testosterone has helped your energy, mood, or sex drive, but you are worried about hair loss

• You are dealing with acne, unwanted hair growth, or hair thinning after starting testosterone

• You want to understand the connection between testosterone, DHT, and female hair loss

• You are curious about DHT blockers, dutasteride, oral minoxidil, copper peptides, or natural hair support

• You want to understand why libido is about more than testosterone alone

• You want a more individualized approach to hormones, sexual health, and midlife vitality

FAQ Section

Is testosterone important for women?

Yes. Testosterone is important for women and may support libido, arousal, orgasm, mood, motivation, energy, muscle, cognitive function, and overall vitality. Women make testosterone naturally, although levels may decline or become less available with age and hormonal changes.

Can testosterone therapy improve libido in women?

Testosterone therapy may improve libido in some women, especially when low testosterone is contributing to low desire, low motivation, fatigue, or reduced sexual response. However, libido is multifactorial and also depends on estrogen, progesterone, dopamine, stress, sleep, thyroid function, blood flow, vaginal health, and relationship factors.

Can testosterone cause hair loss in women?

Testosterone may contribute to hair thinning in some women, especially if they are genetically sensitive to androgens or convert more testosterone into DHT. Hair loss should be evaluated with a full picture that includes thyroid function, ferritin, iron status, stress, hormone levels, medications, and genetics.

What is DHT?

DHT, or dihydrotestosterone, is a more potent androgen made from testosterone through the enzyme 5-alpha-reductase. DHT can contribute to androgen-related hair thinning in women who are genetically sensitive to it.

What are DHT blockers?

DHT blockers are natural or prescription options that may help reduce DHT activity or block the conversion of testosterone into DHT. Examples may include herbal supports, 5-alpha-reductase inhibitors such as dutasteride, and other targeted therapies. These should be used with professional guidance.

Can women use oral minoxidil for hair loss?

Low-dose oral minoxidil is sometimes used for female hair thinning, including androgen-related hair loss. It should be prescribed and monitored by a qualified provider because side effects and individual risk factors matter.

Why should ferritin be checked with hair loss?

Ferritin reflects iron storage, and low ferritin can contribute to hair shedding, fatigue, weakness, and poor hair regrowth. Women with heavy periods, low iron symptoms, or hair loss should consider checking ferritin and iron studies.

Can thyroid problems cause hair loss?

Yes. Thyroid dysfunction can contribute to hair shedding, hair thinning, dry hair, fatigue, weight changes, cold intolerance, and low mood. A full thyroid panel may be helpful when evaluating female hair loss.

Is low libido always caused by low testosterone?

No. Low libido is not always caused by low testosterone. Estradiol, progesterone, dopamine, thyroid function, sleep, stress, blood flow, vaginal dryness, pain with sex, medications, relationship dynamics, and nervous system regulation can all affect desire.

What is PT-141?

PT-141, also known as bremelanotide, is a peptide that acts through melanocortin receptors and is sometimes discussed for low sexual desire. It works more centrally through the brain and nervous system, rather than only through hormones or blood flow.

Should women stop testosterone if they notice hair thinning?

Not always. If testosterone is helping libido, mood, energy, motivation, or quality of life, the answer may not be to stop immediately. A better approach is to assess dose, DHT, thyroid, ferritin, genetics, and other contributors, then build a plan with a knowledgeable practitioner.