The patient sitting across from me is 46. Same partner for twenty-two years. She loves him. She is not depressed. She is not in a difficult marriage. And for the past three years, the part of her brain that used to register desire — that used to initiate, respond, anticipate — has gone quiet. Just gone. She suspects this is hormonal. Her primary care provider drew an estradiol level, said it was "in the normal range for her age," and recommended date nights and a glass of wine. She is not here for date nights. She is here because she suspects — correctly — that something in her physiology has shifted that lifestyle suggestions will not fix.
Libido in mid-life is one of the most undertreated symptoms in adult medicine. The reasons it gets undertreated are partly cultural — there is still discomfort discussing sexual function in clinical settings — and partly structural, in that the standard primary care workflow does not allocate the time or the lab depth required to actually evaluate it. The result is patients who arrive at my office having been told their numbers are normal when their numbers are not optimal, and having been offered antidepressants for what is functionally a hormonal deficiency.
What is actually happening physiologically
Sexual desire in both men and women is the output of a system. Hormones drive a portion of it; neurotransmitters, vascular function, sleep quality, stress load, relationship dynamics, and medication effects all contribute. To say that libido is "just hormonal" is wrong. To say that it is not significantly hormonal is also wrong. The clinical question is what proportion of the patient's specific picture is being driven by which mechanism, and that requires actual evaluation.
In women, the hormones that matter for libido are estradiol, progesterone, testosterone, and DHEA. Estradiol affects vaginal tissue health, lubrication, and the responsiveness of the genital vasculature to arousal. Progesterone affects mood, sleep, and the GABA-mediated calm that allows the nervous system to shift into a state that supports desire. Testosterone — and yes, women produce and require testosterone — is the most direct driver of libido proper, the cognitive and motivational dimension of desire. DHEA is the upstream precursor.
In men, the dominant hormonal driver is testosterone, both total and the bioavailable free fraction. SHBG is part of this picture because it controls how much of the total testosterone is actually available to tissue. Estradiol matters in men too — both too high and too low estradiol disrupt libido and erectile function. Cortisol, thyroid status, and prolactin all modify the picture.
The mechanism most under-recognized in mid-life patients: declining hormones do not just lower the signal level. They also produce changes in receptor density and sensitivity at target tissues, in the binding-protein system, and in the brain circuits that integrate hormonal signals with the rest of the desire system. This is why a patient with "normal" total testosterone can still have a clinically significant libido problem — the active fraction may be low, SHBG elevated, receptors downregulated, or the brain receiving competing signals from elevated cortisol or disrupted sleep.
Why "normal" labs are not the same as "optimal" labs
This is the conversation I have most often. A 47-year-old woman comes in with an estradiol of 38. Her primary care provider said this was normal. The lab's reference range is something like 15-350 in premenopausal women, depending on cycle phase. Thirty-eight is technically inside that range. But for a woman in mid-cycle of a regular cycle, 38 is the bottom edge — and in early perimenopause with cycle irregularity, that 38 may have been drawn on what was effectively a low-estrogen day in a chronically low-estrogen phase. It is normal by the lab's flagging criteria. It is not optimal for how her body needs to function.
The same pattern holds for testosterone in men. The reference range a typical lab uses is something like 264-916 ng/dL. A 50-year-old man with a total testosterone of 320 is "normal" by that standard. He is also at the bottom of a range constructed by averaging values across men of all ages, including men in their 70s and 80s. For a 50-year-old who feels like he is losing his edge, 320 is not optimal.
The work of clinical hormone medicine is in this gap between normal and optimal. Reference ranges are useful for screening for overt disease. They are not adequate for evaluating mid-life symptom patterns.
What I look for in the workup
When I evaluate a mid-life patient with libido as a primary or contributing complaint, the labs I want before the second visit are not casual. The full panel for women includes estradiol, progesterone (timed to cycle phase if cycles are still present), total and free testosterone, SHBG, DHEA-S, FSH, LH, full thyroid panel including TSH, free T3, free T4, reverse T3, and TPO antibodies, fasting insulin and glucose, HbA1c, lipid panel, hs-CRP, vitamin D, ferritin, and prolactin. For some patients I add salivary or AM serum cortisol depending on what the history suggests.
For men the panel is similar, with total and free testosterone, SHBG, sensitive estradiol, LH, FSH, prolactin, full thyroid panel, metabolic markers, lipid panel, hs-CRP, vitamin D, ferritin, and PSA in age-appropriate patients.
The history matters as much as the labs. I want to understand sleep quality (a man with untreated obstructive sleep apnea will not respond to TRT the way a man with normal sleep does), stress load, alcohol intake, current medications with attention to the long list of medications that suppress libido (SSRIs, beta blockers, finasteride, opioids, certain blood pressure medications), and the relational context. I am not a sex therapist — but if the picture is clearly relational rather than physiological, the right answer is a referral, not a prescription.
The second visit is where we sit down with the data and walk through each marker in the patient's specific context.
What [hormone optimization](/services/hormone-therapy-women) actually involves
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For women, the most common scenario is some combination of estradiol replacement (transdermal in most cases — patch, cream, or pellet), bioidentical progesterone (oral micronized at bedtime for the sleep and mood benefit, plus endometrial protection when estrogen is replaced), and low-dose testosterone (cream or pellet, dosed to bring free testosterone into the upper half of the female reference range).
The testosterone piece is the one most often missing from conventional menopausal care. The major medical societies have been slow to formally endorse testosterone therapy for women despite robust evidence supporting it for hypoactive sexual desire disorder. Properly dosed testosterone — physiologic, not supraphysiologic — restores the libido component of the picture in a meaningful proportion of women who have not responded to estrogen and progesterone alone. Doses are small. We do not push past physiologic ranges.
For men, the conversation is about men's testosterone replacement — typically injectable testosterone cypionate, sometimes pellets via Biote pellet therapy, occasionally creams in selected patients. Aromatase management with anastrozole is added only when the estradiol pattern requires it. HCG to preserve fertility is part of the conversation for men not finished having children. Follow-up labs at six to eight weeks, then three months, then quarterly to annually.
The dosing philosophy is conservative. I would rather start at a dose that produces partial response and titrate up at the three-month reassessment than start aggressively and dial back from side effects. Conservative titration produces a stable optimal level rather than oscillation.
How I evaluate response
I see hormone optimization patients back at six to eight weeks for a check-in and at three months for full lab reassessment. What I am looking for early: tolerance issues, side effects, the early symptom pattern. Sleep usually improves first, often within two to three weeks. Energy follows. Mood and cognitive symptoms shift over six to eight weeks. Libido is variable — for some patients it returns within a month; for others it is the slowest symptom to recover, taking three to six months even when labs are optimal.
At three months I have repeat labs and a careful symptom inventory. If labs are in the target range and the patient feels significantly better, we hold the dose. If labs are in range but the symptom response is incomplete, we look at adjacent factors — thyroid, sleep architecture, nutritional status, medications that may be blunting response. If labs are not yet in target range, we adjust dose.
When libido does not respond to hormone optimization
This is a real subset and I am honest about it. Some patients with completed hormonal optimization still do not have the libido return they hoped for. The reasons usually fall into a few categories.
Medication effects we did not catch. SSRIs are the most common culprit and the patient may not want to come off them. Coordination with the prescribing provider is part of the conversation.
Untreated sleep disorders. A man whose total testosterone is now 800 but who is having 30 obstructive events per hour is not going to feel right. Sleep study referral is part of the workup when the history suggests it.
Relational dynamics that hormone optimization will not fix. If desire is absent specifically toward the current partner but present in other contexts, the issue is not endocrine. Counseling referral is the right answer.
Vascular disease in men. Erectile dysfunction with adequate testosterone often points at endothelial dysfunction. PDE5 inhibitors may be the more useful tool.
The work of an honest clinician is distinguishing these scenarios from inadequately optimized hormones, and not pretending more hormone is the answer when it is not.
The next step
If you are recognizing your own pattern in this article — the desire that has gone quiet, the labs that came back "normal" while you continued to feel off, the sense that something physiological has shifted that lifestyle changes are not addressing — the useful next step is the hormone health assessment followed by a comprehensive consultation. Bring any prior labs you have, even if you were told they were normal. Bring a list of current medications and supplements. Bring an honest accounting of what has changed and over what timeframe.
I see hormone patients at both the Columbus location and the Warner Robins location. The protocol is identical at both. You can book a consultation through the online portal, or call either clinic during business hours. Plan on two visits to start — the first for history, examination, and lab orders; the second for lab review and treatment planning. By the end of that second visit you will know what your physiology is actually doing and what the realistic path forward looks like for your specific picture.
Medical disclaimer: This article is for educational purposes only and does not constitute medical advice. Individual clinical decisions should be made in consultation with a qualified healthcare provider following appropriate evaluation. References to specific treatments, dosing, or protocols are informational.
Travis spent 17+ years in high-acuity clinical medicine — emergency, cardiac ICU, and cath lab — before founding Revitalize. He is a Certified Platinum Biote hormone therapy provider, the published author of You're Not Broken — You're Unbalanced, and the founder of the Rebuild Metabolic Health Institute. His clinical writing reflects the same precision he brought to critical care: specific, honest, and built around what actually works.
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