Issue 08 · Getting Started
The Most Consequential Call You'll Make — Here's How to Think About It
"Before you commit to TRT for life, read this"
In issue 03 I laid out the three-type framework in full — primary (testicular failure), secondary (signaling failure upstream), and functional (lifestyle suppression of an otherwise working axis). The distinction matters enormously here, so if you haven't read that issue, start there.
The short version: before you go on TRT, you need to know which category you're in. Most TRT clinics won't tell you — they don't have a business model that benefits from diagnosing functional hypogonadism. A good men's health physician will order the labs that reveal it.
The reason this framework matters for the TRT decision specifically: primary hypogonadism is the only category where TRT is the first-line answer. Secondary and functional hypogonadism both have upstream interventions worth trying first — interventions that preserve your axis rather than replacing it.
A total testosterone of 350 ng/dL is technically within the reference range at most labs (typically 270–1070 ng/dL or similar). It is not, by any stretch, optimal.
Men in the lower quartile of the reference range experience: reduced libido, slower recovery from training, worse body composition outcomes, poorer sleep quality, reduced cognitive sharpness, lower energy. These are real effects at real life. "In range" does not mean "not suffering from low T."
The optimal range for most healthy men under 60 is often cited as 600–900 ng/dL total testosterone with free testosterone in the upper quartile. That's not TRT territory for everyone — some men are naturally there. But if you're at 380 total and symptomatic, that conversation is worth having.
Free testosterone matters as much as total. SHBG (sex hormone binding globulin) binds testosterone and renders it biologically inactive. High SHBG is common with aging, hypothyroidism, and certain medications. Men can have adequate total testosterone but meaningfully low free testosterone because of SHBG. If you're only measuring total T, you're seeing half the picture.
At minimum, before any testosterone conversation:
If any of this is abnormal, you've already learned something about mechanism.
For men with functional or mild secondary hypogonadism (not primary, not severely low), these interventions can produce meaningful improvement without committing to lifelong replacement:
Sleep. This is the most underappreciated testosterone lever in men's health. Testosterone is produced primarily during sleep — specifically during slow-wave and REM sleep. Men who sleep less than six hours have testosterone levels 10–15% lower than adequate sleepers. Undiagnosed sleep apnea is extraordinarily common and can suppress testosterone by 20–30%. If you've never done a sleep study, get one before starting TRT.
Body fat. Visceral adipose tissue expresses aromatase — the enzyme that converts testosterone to estradiol. Higher body fat = more aromatase = more testosterone converted to estrogen = lower T, higher E2, worsening SHBG. Getting body fat to the 12–18% range for most men produces measurable testosterone improvement. This isn't about aesthetics; it's about the aromatase load.
Alcohol. Direct testicular toxin at sustained intake. Reduces LH signaling. Suppresses testosterone synthesis. If you're drinking more than two drinks/day regularly and wondering about low T, start here.
Gonadorelin. Synthetic GnRH — the hypothalamic signal that drives LH and FSH release. Administered as a subcutaneous injection, typically 100–250 mcg two to three times per week. It maintains the LH/FSH signal and thus natural testosterone production. Available through compounding pharmacies with prescription. Realistic ceiling: 100–200 ng/dL testosterone improvement. That's not TRT numbers, but it's real and it preserves axis function.
Kisspeptin. Upstream of gonadorelin in the HPG cascade — kisspeptin neurons in the hypothalamus regulate GnRH pulse frequency. Clinical data (Dhillo et al., 2005) demonstrates kisspeptin administration reliably increases LH pulsatility in men. The access problem: kisspeptin is not yet widely compounded or available through research peptide markets. It will be increasingly accessible. It's the upstream target that gonadorelin cannot address.
If you've addressed the modifiable lifestyle factors, established that you have true primary or secondary hypogonadism (not functional), and your levels are symptomatic and not responding to axis support — TRT is appropriate. It's not a failure. It's a legitimate medical intervention for a real hormonal deficiency.
What TRT does well: reliably raises testosterone to optimal levels, improves body composition, libido, recovery, energy, cognitive function, mood. The evidence base is solid.
What TRT doesn't automatically solve: the HPTA suppression it causes. TRT signals the HPG axis to shut down. LH and FSH drop to near zero. Testicular function ceases. Testicular volume decreases over months. Fertility may be impaired.
For men on TRT who want to preserve testicular function — for fertility or for testicular health generally — gonadorelin co-administration is the current standard. Gonadorelin provides the LH-like signal that maintains testicular activity. This is the current replacement for hCG, which the FDA restricted in compounding in 2020.
The monitoring protocol on TRT matters: testosterone levels, estradiol (sensitive), hematocrit (TRT raises red blood cell production; elevated hematocrit is a real cardiovascular risk), PSA quarterly for the first year, then annually.
Here's how I'd simplify it:
Under 50, borderline labs (350–500 ng/dL), symptomatic but not severely: Address sleep, body fat, alcohol first. Add gonadorelin if you want axis support. Re-test at 3 months. If you're at 500–600 and feel significantly better — stay the course, you're likely functional. If you're at 380 and symptomatic after addressing the modifiable factors — TRT conversation becomes appropriate.
Over 50, low labs, not primary hypogonadism: Axis support has a lower ceiling. The age-related hypothalamic drift is real. TRT is appropriate to discuss sooner in the decision tree.
Any age, clearly primary hypogonadism (high LH/FSH, low T): TRT is the right intervention. Axis support won't help when the problem is the testes themselves.
Any age, symptomatic with labs above 600: Look for SHBG, estradiol, and sleep issues before assuming you need testosterone. The problem may not be production.
The testosterone conversation is one where getting the framing right before you walk into a clinic changes everything you do next. Know your type, know your labs, know what you're deciding before you decide it.
Nine issues in and we've covered the biology, the compounds, the evidence, and the decision points. The last issue is practical: labs before you start, how to pick your first peptide, and what the first eight weeks actually look like. The map is done — next issue is the territory.