The Testosterone Question — Men's Health Intelligence

1-2%

decline per year after 30

300-1000

ng/dL normal range

$5B

TRT market

2-3%

actual deficiency rate

Testosterone declines naturally with age—about 1-2% per year after 30. This is normal physiology, not disease. The multi-billion dollar TRT industry has convinced many men they need treatment for normal aging. True hypogonadism exists and benefits from treatment. But most men being treated don't have it.

The normal range is enormous. 300-1000 ng/dL is considered normal. A 60-year-old with 400 ng/dL is normal for his age—but T clinics may call him "low" and offer treatment. "Optimal" levels pushed by clinics are young-man targets with no evidence base.

The Natural Decline

Testosterone Levels by Age

Average total testosterone with normal range bands

Source: Travison et al., J Clin Endocrinol Metab 2017; Harmonized reference ranges

Population averages have declined. Men today have lower T than men of the same age 30 years ago—but this is likely due to rising obesity rates, not environmental factors. Obesity powerfully suppresses testosterone.

What Actually Affects Testosterone

📉 What Lowers T

Obesity: Fat converts T to estrogen. Losing weight often raises T significantly.
Sleep deprivation: One week of 5hr nights drops T 10-15%
Opioids: Very common cause of low T; often missed
Chronic illness: Diabetes, liver disease, kidney disease
Sleep apnea: Treating it often raises T
Stress/depression: Cortisol suppresses T production
Age: Gradual decline is normal

📈 What Actually Raises T (Naturally)

Weight loss: Losing fat is the most effective intervention
Sleep optimization: 7-9 hours consistently
Resistance training: Modest but real effect
Treat sleep apnea: Often normalizes T
Stop opioids: If medically possible
Reduce stress: Lower cortisol, higher T
Adequate zinc/vitamin D: Only if deficient

TRT: What the Evidence Says

The TRAVERSE trial (2023) was the largest safety study of TRT—over 5,000 men followed for years. It settled the cardiovascular safety question but also clarified what TRT does and doesn't do.

Outcome	Evidence	Effect Size	Notes
Sexual function	Moderate benefit	Modest improvement	Libido and erections improve; not dramatic
Anemia	Clear benefit	Increases hemoglobin	Erythrocytosis is actually a side effect
Bone density	Moderate benefit	Modest increase	Relevant for osteoporosis
Body composition	Small benefit	Small changes	Slight more muscle, less fat
Energy/vitality	Minimal benefit	Not better than placebo	The marketing promise; doesn't deliver
Mood/depression	Inconsistent	Mixed results	Not a depression treatment
Cognitive function	No benefit	No improvement	Doesn't help memory or cognition
Cardiovascular safety	Neutral	No increased risk	TRAVERSE: non-inferior to placebo

The TRAVERSE trial bottom line: TRT is cardiovascularly safe (no increased heart attacks/strokes), but benefits are modest and limited mainly to sexual function and anemia. The "feel younger, more energetic" marketing claims are not supported by evidence.

T Clinic Red Flags

Appropriate vs. Inappropriate TRT Workup

What should happen before starting testosterone

Source: Endocrine Society Clinical Practice Guideline 2018

🚩 Red Flags at T Clinics

Diagnosis based on single test (need at least 2)
Not checking morning levels (T peaks in AM)
Targeting "optimal" not normal ranges
Not investigating underlying causes
Prescribing without symptoms (just low number)
Aggressive upselling of add-ons (HCG, AI, etc.)
Cash-only, no insurance accepted

✅ Appropriate Workup

Two morning testosterone levels
Check free or bioavailable T (not just total)
Measure LH/FSH to determine cause
Evaluate for sleep apnea
Screen for obesity, depression, opioid use
Trial of lifestyle optimization first
Shared decision-making about benefits/risks

✓ Your Testosterone Action Plan

✓ If symptomatic, get TWO morning testosterone levels

✓ Investigate underlying causes before TRT

✓ Lose weight if overweight—often raises T significantly

✓ Optimize sleep—get tested for sleep apnea if indicated

✓ Review medications for T-lowering effects (opioids)

✓ Be skeptical of "optimal" levels at T clinics

✓ If TRT, expect modest sexual benefits—not energy miracle

✓ Don't expect supplements ("T boosters") to work—they don't

📌 The Bottom Line

Decline Is Normal

1-2% per year after 30 is physiology, not disease. Most men don't need treatment.

Fix Underlying Causes

Obesity, sleep apnea, opioids—address these first. T often normalizes.

Benefits Are Modest

TRT helps sexual function and anemia. Energy/vitality improvements don't beat placebo.

Be Clinic-Skeptical

T clinics profit from overdiagnosis. Demand proper workup and realistic expectations.

Sources & Further Reading

Lincoff AM, et al. Cardiovascular safety of testosterone-replacement therapy (TRAVERSE). N Engl J Med. 2023;389(2):107-117.
Snyder PJ, et al. Effects of testosterone treatment in older men (TTrials). N Engl J Med. 2016;374(7):611-624.
Bhasin S, et al. Testosterone therapy in men with hypogonadism: an Endocrine Society clinical practice guideline. J Clin Endocrinol Metab. 2018;103(5):1715-1744.
Travison TG, et al. Harmonized reference ranges for circulating testosterone levels in men. J Clin Endocrinol Metab. 2017;102(4):1161-1173.