What Causes Low Testosterone in Men? Understanding the Root Causes
Low testosterone (also called low T or hypogonadism) is more common than many men realize, and it can significantly affect energy, libido, muscle mass, mood, focus, and overall vitality. While levels naturally decline with age, several underlying factors can accelerate this drop or cause clinically low testosterone even in younger men. At Revique Medical & Aesthetics, our functional wellness medical spa in Arlington, TX 76005, we specialize in root-cause, functional, and preventative medicine with a strong emphasis on men's hormone optimization and intimate wellness. Our team, with over 50 years of combined experience, uses comprehensive testing, DNA insights, and advanced protocols to identify the true drivers of low testosterone and create highly customized, patient-specific treatment plans.
Here are the most common causes of low testosterone in men:
1. Aging (Primary Hypogonadism – Testicular Decline)
Testosterone production naturally decreases by about 1–2% per year starting around age 30–35.
By age 40–50, many men notice subtle changes; by 60+, levels can drop significantly in some individuals.
This age-related decline is normal, but when symptoms appear and levels fall below the optimal range, it becomes treatable.
2. Obesity and Metabolic Syndrome
Excess body fat (especially abdominal fat) increases aromatase activity, converting testosterone into estrogen.
Insulin resistance and inflammation from obesity further suppress testosterone production.
Studies show men with higher BMI often have 20–30% lower testosterone levels.
3. Chronic Stress and High Cortisol
Prolonged stress elevates cortisol, which suppresses the hypothalamic-pituitary-gonadal (HPG) axis, reducing luteinizing hormone (LH) and ultimately testosterone.
Poor sleep, overtraining, or burnout can create a vicious cycle of low T and fatigue.
4. Sleep Disorders (Especially Sleep Apnea)
Testosterone production peaks during deep REM sleep.
Obstructive sleep apnea or poor sleep quality dramatically reduces nighttime testosterone surges, some studies show men with untreated sleep apnea have 10–15% lower levels.
5. Medications and Substances
Opioids, corticosteroids, certain antidepressants, chemotherapy, radiation, and anabolic steroid use (followed by post-cycle suppression) are well-known testosterone suppressors.
Excessive alcohol, marijuana, and recreational drugs can also impair testicular function.
6. Chronic Illnesses and Inflammation
Diabetes (type 2), metabolic syndrome, kidney disease, liver disease, HIV, and chronic inflammatory conditions lower testosterone through direct testicular effects or HPG axis disruption.
7. Pituitary or Hypothalamic Issues (Secondary Hypogonadism)
Tumors, head trauma, radiation, or genetic conditions can impair the pituitary gland or hypothalamus, reducing LH and FSH signals to the testes.
This is less common but important to rule out with proper lab work.
8. Environmental and Lifestyle Factors
Exposure to endocrine-disrupting chemicals (plastics, pesticides, parabens, phthalates)
Sedentary lifestyle, nutrient deficiencies (zinc, vitamin D, magnesium), and poor diet
Overtraining without adequate recovery
Cleveland Clinic outlines aging, obesity, medications, chronic illness, and pituitary issues as primary causes of low testosterone in men. Learn more about low testosterone causes from Cleveland Clinic.
Mayo Clinic emphasizes that low T can result from testicular problems, pituitary/hypothalamic disorders, or lifestyle/medical conditions. Explore causes of male hypogonadism at Mayo Clinic.
Harvard Health highlights obesity, sleep apnea, stress, and certain medications as key contributors. Read more on low testosterone from Harvard Health.
The Revique Approach: Identify and Address the Root Cause
At Revique, we don’t just treat low numbers, we uncover why your testosterone is low. Your personalized plan may include:
Comprehensive hormone panels (total T, free T, SHBG, LH, FSH, estradiol, cortisol, thyroid, vitamin D, etc.)
DNA testing for genetic predispositions
Gut health assessment (inflammation and microbiome impact hormones)
Medically supervised weight loss and muscle enhancement programs
Peptide therapy for targeted support
Dietary counseling and lifestyle optimization
Hormone optimization with bioidentical testosterone when appropriate, closely monitored for safety
We offer flexible payment plans, financing, and membership pricing to make care accessible.
Don’t assume low energy, reduced drive, or loss of strength is “just aging.” Many men reclaim vitality once the root cause is addressed.
Ready to test your levels and get answers? Schedule a confidential consultation today at Revique Medical & Aesthetics in Arlington, TX 76005. Visit our contact page or call our office.
Feel strong, energized, and confident again—Revique is here to help you optimize from the inside out!
