Men's Testosterone Optimization: What Your Labs Really Mean
Low testosterone is real. So is the industry built around oversimplifying it. Here is what evidence-based hormonal optimization actually looks like - and why it starts with the full picture, not just a prescription.
At Griffin Concierge Medical in Tampa and St. Petersburg, men's hormonal health is one of the areas where we go deepest. We see it regularly: a member comes in feeling off - lower energy, declining performance in the gym, brain fog that was not there a year ago, changes in mood or libido - and wonders if testosterone is the answer.
Sometimes it is. But the path to getting there matters as much as the destination.
Testosterone has become one of the most discussed topics in men's health. Online clinics promise to "restore your edge" with a prescription in 48 hours. Social media influencers promote TRT as the solution to everything from brain fog to belly fat. Meanwhile, many traditional primary care physicians remain reluctant to test testosterone at all, dismissing symptoms as normal aging.
The reality is more nuanced than either side suggests. Low testosterone is a legitimate condition with real consequences for energy, cognition, body composition, cardiovascular health, and quality of life. But a number on a lab report does not tell the whole story. And rushing to a prescription without understanding what is driving the decline can mean treating a symptom while missing the cause.
This article explains how testosterone works, what causes it to decline, what your labs actually mean, and how your Griffin physician approaches optimization - starting with the full picture.
Testosterone declines approximately 1-2% per year after age 30. But many factors accelerate this - and many are reversible.
Understanding the Decline
Testosterone production is controlled by a signaling chain that starts in the brain. The hypothalamus sends a signal to the pituitary gland, which tells the testes to produce testosterone. When levels are adequate, the brain dials the signal down. When levels drop, signaling increases. This feedback loop is why so many different factors can affect your levels.
The age-related decline is real and well-documented. After about age 30, total testosterone drops 1-2% per year on average. But "average" hides enormous individual variation. Some men maintain strong testosterone levels into their 60s and 70s. Others experience meaningful declines by their late 30s. The difference often comes down to factors you can change:
- Body composition. Fat tissue contains an enzyme that converts testosterone into estrogen. The more body fat you carry - especially around the midsection - the more testosterone gets diverted. This creates a cycle: low testosterone promotes fat storage, and fat storage further suppresses testosterone.
- Sleep. Testosterone production peaks during deep sleep. Chronic sleep deprivation directly suppresses production. Studies show that sleeping five hours per night reduces testosterone by 10-15% compared to eight hours.
- Chronic stress. As we have discussed in our cortisol and burnout article, the body prioritizes stress hormone production under chronic pressure, often at the expense of sex hormone production.
- Metabolic health. Insulin resistance, type 2 diabetes, and metabolic syndrome are all strongly associated with low testosterone. Improving metabolic function often improves testosterone on its own.
- Medications. Opioids, certain antidepressants, and some hair loss medications can suppress testosterone or change how your body processes it.
This is why we never start with a prescription. The first question is not "what is your testosterone level?" It is "what is driving it down, and can we address that first?"
"A testosterone level is a number. What I need to understand is the context behind that number - sleep, stress, metabolic health, medications, body composition. Sometimes optimizing those factors is the treatment. Sometimes the level still warrants intervention. But you do not know until you look at the full picture."
Dr. Debbie St. Clair, Griffin Concierge MedicalThe Labs That Actually Matter
One of the most common mistakes in testosterone evaluation - even among traditional primary care physicians - is testing only total testosterone. That single number does not give you enough information to make a clinical decision. At Griffin Concierge Medical, we run a comprehensive hormonal panel because every marker adds a piece to the picture. Please note that standard vs. optimal ranges can vary by lab company.
Total Testosterone
Starting PointTotal testosterone measures all the testosterone in your blood - both the portion that is bound to proteins and the small fraction that is free. About 98% of circulating testosterone is bound and not directly available to your body. So total testosterone tells you how much you are producing, but not how much is actually usable.
Free Testosterone
Clinically CriticalFree testosterone is the unbound fraction - the roughly 2% that is directly available to your body. A man can have "normal" total testosterone but low free testosterone if too much of it is being bound up by a protein called SHBG. This is common with aging, thyroid issues, and certain medications. Free testosterone often explains symptoms that total testosterone does not.
SHBG, Estradiol, LH, and Supporting Markers
The Full PictureSHBG (sex hormone-binding globulin) is the protein that binds testosterone and makes it unavailable. High SHBG means less free testosterone reaches your tissues, even if your total number looks fine. Low SHBG can mean more free testosterone but may point to metabolic issues.
Estradiol needs to be balanced. Too high and you may experience water retention, breast tissue changes, and mood shifts. Too low and you can get joint pain, low libido, and mental fog. Managing estradiol is a key part of any testosterone protocol.
LH (luteinizing hormone) helps your physician determine where the problem originates. Low testosterone with high LH suggests the testes are not responding to signals. Low testosterone with low LH suggests the brain is not sending the signal. This distinction shapes the entire treatment approach.
We also evaluate thyroid function, metabolic markers (fasting insulin, lipids, HbA1c), a complete blood count, PSA for prostate screening, and additional hormones depending on the clinical picture. Every marker adds context that a single testosterone number cannot.
Treatment: Individualized, Not One-Size-Fits-All
When the clinical picture supports treatment, the next question is which approach fits the individual - not which protocol is easiest to prescribe. At Griffin, we match the method to the member's labs and goals.
| Method | How It Works | Best For |
|---|---|---|
| Subcutaneous Injections | Testosterone injected into fat tissue, typically twice weekly | Precise dosing, steady levels, self-administered at home |
| Intramuscular Injections | Same medication injected into muscle, often weekly | Well-established, reliable absorption |
| Topical Creams/Gels | Compounded testosterone applied to the skin daily | Men who prefer no injections; steady, adjustable dosing |
| Clomiphene Citrate | Oral medication that stimulates your body's own testosterone production | Men who want to preserve fertility |
| hCG | Stimulates testicular testosterone production directly | Fertility preservation; often combined with other therapies |
Many of our testosterone prescriptions are compounded through our partnership with Restore Pharmacy, which allows us to dial in the exact concentration and formulation each member needs rather than rounding to the nearest commercially available strength.
The approach is always the same: start conservative, monitor closely, and adjust based on how you respond - both in your labs and how you feel.
When the Full Panel Tells a Different Story
A member in his early 40s joined Griffin interested in hormonal optimization. He had been dealing with progressive fatigue, declining performance in the gym, difficulty maintaining lean mass despite consistent training, and reduced libido. He had never had a comprehensive hormone panel - just a basic physical with standard bloodwork that came back "normal."
His initial labs with us told a different story. While his total testosterone was technically within the reference range, his free testosterone was in the bottom tenth percentile for his age. His SHBG was elevated, meaning most of his circulating testosterone was bound up and unavailable. Estradiol was on the higher end, and metabolic markers showed early insulin resistance. His wearable data confirmed consistently poor deep sleep.
We started with the fundamentals: sleep optimization, targeted exercise modifications, and dietary changes to address the insulin resistance. Over three months, his metabolic markers improved meaningfully - but free testosterone remained low and symptoms persisted. We initiated a compounded testosterone protocol with careful monitoring. Within two months, his free testosterone reached the upper quartile, his symptoms resolved, and his body composition started shifting in the right direction.
A single total testosterone reading would have missed everything. The comprehensive panel - combined with clinical context - told the real story.
Monitoring: The Part Most Clinics Skip
Starting testosterone therapy is the beginning of clinical management, not the end. This is where physician-guided care differs fundamentally from a mail-order prescription. At Griffin, we monitor closely:
- Hematocrit. Testosterone stimulates red blood cell production. If levels rise too high, it increases blood viscosity and cardiovascular risk. We check this at every lab draw.
- Estradiol. Some testosterone converts to estrogen in the body. Unchecked estradiol can cause water retention, mood changes, and breast tissue changes. Management may include dose adjustment, injection frequency changes, or targeted intervention.
- PSA. Baseline and periodic prostate screening is standard. Testosterone therapy has not been shown to cause prostate cancer, but it is not used in men with active, untreated prostate cancer.
- Lipids and metabolic markers. Testosterone can affect cholesterol levels. Ongoing monitoring ensures cardiovascular risk is not increasing.
- How you feel. Numbers matter, but so does your quality of life. We adjust protocols based on both objective data and how you are actually responding.
Our typical cadence: labs at 6-8 weeks after starting or changing a dose, then every few months during the first year, and every 6 months once things are stable. This level of follow-up is what makes the difference between optimization and guesswork.
Interested in Getting the Full Picture?
If you are a Griffin member experiencing fatigue, changes in body composition, brain fog, or other symptoms that do not seem to have a clear explanation, bring it up at your next visit. Hormonal health is one of the areas where we go deepest, and a comprehensive panel is the starting point. Reach out to your care coordinator to schedule time.
If you are not yet a member and want to learn more about how Griffin approaches men's health, contact us to start a conversation.
Key Takeaways
- "Normal" does not mean optimal. A total testosterone within the reference range can still be profoundly symptomatic. Free testosterone and SHBG provide the context your doctor needs.
- Address reversible causes first. Sleep, body composition, stress, metabolic health, and medications can all suppress testosterone - and improving them sometimes improves the level on its own.
- Total testosterone alone is not enough. Free testosterone, SHBG, estradiol, LH, and metabolic markers are all necessary for an accurate clinical picture.
- Treatment is individualized. Injections, topicals, and oral options each have appropriate use cases. There is no single "best" protocol for everyone.
- Monitoring is non-negotiable. Hematocrit, estradiol, PSA, and lipids must be tracked throughout therapy. Optimization without monitoring is not safe optimization.
- Fertility matters. Testosterone therapy suppresses sperm production. Men considering future fertility need a different approach, and it should be discussed before starting treatment.
Frequently Asked Questions
Standard lab reference ranges list 264-916 ng/dL as "normal" for total testosterone, but this range is based on population averages that include men of all health levels. A 40-year-old man at 280 ng/dL is technically within range but may have real symptoms. At Griffin Concierge Medical, we evaluate total testosterone, free testosterone, and SHBG together and consider symptoms alongside the numbers. For most men, optimal total testosterone falls between 500-900 ng/dL, with free testosterone in the upper quartile for age.
Testosterone naturally declines about 1-2% per year after age 30, but many factors speed this up. Excess body fat converts testosterone to estrogen. Chronic stress elevates cortisol at the expense of sex hormones. Poor sleep directly suppresses production. Metabolic conditions like insulin resistance and type 2 diabetes are strongly linked to low levels. Certain medications, including opioids and some hair loss treatments, can also play a role.
When prescribed appropriately and monitored by a physician, TRT has a strong safety profile. The TRAVERSE trial (2023), the largest study of its kind, found no increased risk of major cardiovascular events in men with low testosterone. However, TRT does require ongoing monitoring of hematocrit, PSA, estradiol, and lipids. It also suppresses your body's natural testosterone production and fertility. These considerations are why physician oversight, not a mail-order prescription, is essential.
Yes. Testosterone therapy suppresses the hormones (LH and FSH) that drive sperm production. For men who want to preserve fertility, alternatives like clomiphene citrate or hCG can raise testosterone while supporting sperm production. If future fertility is a possibility, this must be discussed with your physician before starting treatment.
Many testosterone clinics use a high-volume, one-size-fits-all model: a brief consultation, a testosterone prescription, and minimal follow-up. Physician-guided optimization includes a full diagnostic workup, treatment of reversible causes first, individualized dosing, regular lab monitoring, and management of the entire hormonal picture - not just testosterone in isolation.
For some men, yes - particularly when the decline is driven by factors you can change. Resistance training, quality sleep (7-9 hours), weight loss, stress management, and correcting nutritional gaps (vitamin D, zinc, magnesium) can meaningfully improve testosterone levels. However, natural optimization has limits. If the underlying cause is a testicular or pituitary issue, or if levels remain low and symptomatic despite sustained lifestyle changes, medical intervention may be warranted.
Total testosterone tells you how much your body is producing. Free testosterone tells you how much is actually available to your tissues. About 98% of circulating testosterone is bound to proteins and cannot be used by your body. A man with a "normal" total testosterone can still have very low free testosterone - especially if SHBG is elevated, which is common with aging and thyroid issues. Testing both gives your physician a much more accurate picture.
