Testosterone Optimization for Men: Beyond the Myths

By Dr. Charles Kamen, MD — Board-Certified Neurologist, LiveWell21, Las Vegas, NV
Albert Einstein College of Medicine (MD, 2011) | Yale-New Haven Hospital Internship (2011–2012) | Loma Linda University Neurology Residency (2015–2018) | ABPN Board Certified

Testosterone therapy has a PR problem. Depending on who you ask, it's either a dangerous shortcut used by athletes who can't play by the rules, or a miracle cure that will restore your 25-year-old self overnight. Neither characterization is accurate. The reality — grounded in decades of research and evolving clinical practice — is considerably more nuanced, and considerably more useful.

As a physician practicing in Las Vegas who specializes in hormonal and longevity medicine, I see men at different stages of testosterone decline. Some are in their late 30s, noticing changes they can't attribute to anything in particular. Others are in their 50s and 60s, frustrated by energy levels, body composition, and mood shifts that have accumulated slowly over years. In nearly every case, they've encountered more myths than facts about what low testosterone actually is and what treatment can — and cannot — do.

This post is my attempt to give you the facts.

How Testosterone Changes in Men Over Time

Testosterone production peaks in early adulthood — typically the late teens and early 20s — and then begins a gradual, predictable decline. Research consistently shows testosterone levels fall by approximately 1–2% per year after age 30.¹ This is a normal physiological process, not a disease. But for some men, levels fall to a range that produces symptoms — a condition called hypogonadism when clinically diagnosed.

The clinical threshold for low testosterone is typically defined as a total testosterone below 300 ng/dL on two separate morning measurements, though many clinicians — myself included — also consider symptoms, free testosterone levels, and the clinical context. A man with a total testosterone of 350 ng/dL and debilitating fatigue, lost libido, and significant muscle loss may have a genuine therapeutic need; a man with the same number who feels excellent may not.

Several factors accelerate testosterone decline beyond the expected rate:

• Obesity and metabolic syndrome — adipose tissue converts testosterone to estrogen via aromatase
• Chronic sleep deprivation — most testosterone is produced during deep sleep
• Chronic psychological stress — sustained cortisol elevation suppresses testosterone production
• Sedentary lifestyle — resistance exercise is one of the most potent natural testosterone stimulants
• Certain medications — opioids, corticosteroids, and some antidepressants
• Underlying medical conditions — type 2 diabetes, hypothyroidism, and pituitary disorders

Symptoms of Low Testosterone: What to Look For

The symptoms of low testosterone are real and often significantly affect quality of life. They are also, individually, nonspecific — many overlap with depression, thyroid dysfunction, sleep disorders, and general aging. This is precisely why diagnosis requires both lab confirmation and clinical evaluation, not one or the other.

The most common symptoms I evaluate in Las Vegas men include:

• Fatigue and low energy — a persistent sense of depletion not explained by activity or sleep
• Reduced libido — diminished sexual interest, often gradual enough that men don't notice it's changed until they reflect on it
• Erectile dysfunction — testosterone is not the only driver of erection, but it is a contributing factor, particularly for desire and arousal
• Mood changes — irritability, difficulty managing stress, emotional flatness, or depression
• Cognitive changes — brain fog, difficulty concentrating, reduced mental sharpness
• Changes in body composition — loss of muscle mass and strength; increased abdominal fat
• Reduced bone density — testosterone is important for skeletal health; long-standing low levels increase fracture risk
• Reduced body and facial hair
• Infertility — low testosterone can impair sperm production
• Hot flashes — yes, men experience these too with significant testosterone decline

If you recognize four or more of these in yourself, it's worth having a proper evaluation — not self-diagnosing or self-treating.

What the Research Actually Shows About TRT

The evidence base for testosterone replacement therapy has improved substantially in recent years. Here's an honest summary of what we know.

The TRAVERSE Trial — The Biggest Study to Date

Published in the New England Journal of Medicine in 2023, the TRAVERSE trial enrolled over 5,200 men aged 45–80 with hypogonadism and pre-existing cardiovascular disease or high cardiovascular risk. Participants were randomized to testosterone gel or placebo and followed for a median of 33 months.²

The findings: testosterone therapy did not increase the incidence of major adverse cardiovascular events (MACE) — heart attack, stroke, or cardiovascular death. It also improved sexual function and reduced symptoms of hypogonadism. The trial did find a higher rate of atrial fibrillation, pulmonary embolism, and acute kidney injury in the testosterone group — effects that warrant monitoring, particularly in higher-risk patients.

Metabolic and Compositional Effects

Meta-analyses of TRT trials consistently show improvements in lean muscle mass, reductions in fat mass, and improvements in insulin sensitivity in men with documented hypogonadism.³ These aren't cosmetic results — they translate to functional capacity and metabolic health.

Mood and Cognition

The evidence here is more mixed, but a number of studies — and substantial clinical experience — support improvements in mood, motivation, and cognitive function in hypogonadal men treated with testosterone. As a neurologist, this is an area I find particularly compelling. The brain has testosterone receptors, and testosterone influences dopamine signaling, neuroprotection, and even aspects of verbal memory and spatial reasoning.

What TRT Does Not Do

It's equally important to be honest about limitations:

• TRT suppresses the body's own testosterone production and affects sperm production. Men who want to preserve fertility need careful discussion of options including clomiphene or hCG rather than exogenous testosterone.
• TRT does not eliminate the need for lifestyle changes. Sleep, nutrition, resistance exercise, and stress management are foundational — not optional add-ons.
• TRT is not appropriate for prostate cancer patients or those with certain cardiovascular conditions.
• The effects are not overnight. Meaningful changes in energy, body composition, and mood typically take 3–6 months to fully develop.

Lifestyle Factors That Genuinely Move the Needle

Before, alongside, or instead of TRT, there are lifestyle interventions with robust evidence for maintaining and supporting testosterone levels:

• Resistance training — compound movements (squats, deadlifts, rows) consistently raise testosterone and maintain it. Even 2-3 sessions per week produces measurable effects.
• Sleep optimization — 7–9 hours of quality sleep. Studies show even one week of sleep restriction to 5 hours per night reduces testosterone levels by 10–15%.⁴
• Weight management — reducing excess body fat, particularly visceral fat, directly raises free testosterone by reducing aromatase activity.
• Stress reduction — chronic cortisol elevation competitively inhibits testosterone. Practices that lower cortisol — meditation, adequate rest, managing overcommitment — matter.
• Dietary foundations — adequate dietary fat (testosterone is synthesized from cholesterol), adequate zinc and vitamin D, and avoiding severe caloric restriction.

These aren't alternatives to medical treatment when treatment is indicated — they're the foundation on which any hormone optimization program is built.

Monitoring During Testosterone Therapy

Safe testosterone therapy requires regular monitoring. At LiveWell21, we track:

• Total and free testosterone (to keep levels in therapeutic range)
• Estradiol (testosterone converts to estrogen; elevated estradiol causes its own symptoms)
• Complete blood count — testosterone stimulates red blood cell production; elevated hematocrit increases clotting risk
• PSA — monitored in men over 40 as a baseline and periodically thereafter
• Lipid panel and metabolic markers
• Symptom tracking — numbers guide treatment, but how you feel guides decisions

Frequency of monitoring is typically higher in the first year of therapy and adjusted based on stability and response.

When to See a Doctor About Testosterone

You should schedule a proper evaluation if:

• You have multiple symptoms from the list above that have persisted for more than a few months
• Your primary care labs show testosterone below 400 ng/dL along with symptoms
• You're considering testosterone supplementation from any source — including over-the-counter "testosterone boosters" or online prescribers who don't require in-person evaluation
• You've already started TRT elsewhere but don't feel you're being properly monitored

Las Vegas has no shortage of testosterone clinics. The question is whether you're getting a thorough evaluation, appropriate monitoring, and a plan that addresses the whole picture — not just a prescription.

Testosterone Optimization at LiveWell21 in Las Vegas

At LiveWell21, testosterone optimization is part of a comprehensive hormonal and longevity medicine approach. We don't treat a number — we treat a person. That means understanding your history, your lifestyle, your goals, and your risk factors before recommending any intervention.

If testosterone therapy is appropriate, we'll build a plan that includes the right formulation for your situation, regular monitoring, and integration with other aspects of your health — including sleep, metabolic health, peptide therapy, and, where appropriate, senolytic protocols.

Book a Testosterone Consultation at LiveWell21

Explore related services at LiveWell21:
Hormone Optimization | Peptide Therapy | Longevity Medicine

References

1. Feldman HA, et al. "Age trends in the level of serum testosterone and other hormones in middle-aged men: longitudinal results from the Massachusetts male aging study." Journal of Clinical Endocrinology & Metabolism. 2002;87(2):589-598.
2. Lincoff AM, et al. "Cardiovascular Safety of Testosterone-Replacement Therapy." New England Journal of Medicine. 2023;389(2):107-117.
3. Snyder PJ, et al. "Effects of Testosterone Treatment in Older Men." New England Journal of Medicine. 2016;374:611-624.
4. Leproult R, Van Cauter E. "Effect of 1 week of sleep restriction on testosterone levels in young healthy men." JAMA. 2011;305(21):2173-2174.

This content is for educational purposes and does not constitute medical advice. Consult a qualified physician before starting any hormone therapy.