Before you start: week 0
The protocol begins before the first injection or pump. Week 0 is bloodwork. Total T, Free T, SHBG, estradiol, LH, FSH, prolactin, hematocrit, CMP, PSA. Your physician reads it. You and they agree on a starting dose. You ship.
If you skip this step — if a clinic offers you testosterone without ever drawing your blood — close the tab. Walk away.
Weeks 1–2: the boring part nobody warns you about
Most men feel nothing. Some men feel a mild lift in mood by day 5. Some feel anxious or wired for 48 hours after the first dose — that's adrenal recalibration, not a problem.
The real shift hasn't happened yet. Receptor density takes time to upregulate. Be patient. Don't escalate dose because "it's not working." It is. You can't feel it yet.
Weeks 3–4: the first real signal
Sleep deepens first for most men. Morning erections return — this is one of the most reliable early markers, and it's a good one because it's binary. Either they're back, or they aren't.
Energy improves. Mood floor rises. Many men report a kind of emotional steadiness they hadn't realized they'd lost. This is not a placebo — it's the prefrontal cortex remembering what optimal looks like.
"I didn't notice I was anxious until the anxiety left."— Dominant patient, week 4 check-in
Weeks 5–8: body composition starts to move
The first visible change is usually in the face: less puffiness, more definition. Then training capacity climbs — recovery between sets, between sessions, between days. If you lift, you'll notice you're lifting more without trying harder.
Week 8 bloodwork. This is the first real instrument check. Are you in the target band? Is E2 in range? Is hematocrit climbing? Your physician adjusts dose based on numbers, not vibes.
Weeks 9–12: the libido return
Libido is the slowest of the major markers — and the most variable. Some men report return at week 4. The median is around week 10. A few don't see it until month 6. The variance is normal.
If libido is the symptom you started for and it hasn't shifted by week 12, that's a conversation with your physician. There may be something else going on — prolactin, dopamine, sleep, stress, relationship dynamics.
Weeks 13–16: visible body composition shift
Lean mass climbs. Fat mass falls. Most men add 4–8 lbs of muscle and lose 5–10 lbs of fat in the first 16 weeks without changing their training. With training? More.
Week 16 bloodwork. Second instrument check. By now your numbers should be settled. If they aren't, dose is wrong, route is wrong, or there's a confound (sleep, alcohol, undiagnosed thyroid, etc.).
Months 5–6: the new baseline
The "wow, this is different" phase ends. The "this is just how I feel now" phase begins. This is the goal.
If you started TRT for symptoms — low energy, low libido, low mood, poor recovery — those should be resolved or near-resolved by month 6. If they aren't, again: dose, route, or confound.
Months 4–6 are when most men quit. Not because the protocol failed — because the novelty wore off and their lives got busy. Make this easier by setting recurring calendar reminders for injection day, and by re-reading your week-0 lab values when you forget why you started.
Months 7–9: optimization, not initiation
Now we tune. Not dose alone — sleep, training periodization, nutrition, recovery, stress load. Testosterone is a system input. The output depends on the rest of the system.
If you've been training, lift weights have likely climbed 15–25%. If you haven't, this is a great time to start. Muscle protein synthesis is meaningfully elevated; it's a one-time discount on the cost of building.
Months 10–12: the year-one panel
Full bloodwork at month 12. We compare it to month 0. The instrument tells you whether the year worked.
For most men on a properly dosed protocol, month-12 numbers look like this:
- Total T in target range (650–950 ng/dL for most protocols)
- Free T in optimal band
- Estradiol in normal range (no AI needed for most men)
- Hematocrit stable below 52% (or managed with periodic donation)
- PSA stable, no concerning trajectory
- Lipids, glucose, BP — same or better than baseline
What year two looks like
Year two is maintenance. Quarterly bloodwork. Annual full physical. Dose adjustments are rare. The protocol works because the protocol works.
The men who stay on are the men who treat it like dental hygiene: routine, instrumented, unsexy, effective.