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A plain-language comparison of common TRT protocols - once-weekly, twice-weekly, and every-other-day microdosing, with or without HCG - and how monitoring fits each.
Same goal, different schedules and add-ons
A TRT protocol is simply the plan your prescriber sets for restoring testosterone to a healthy range: how much testosterone, how often you inject it, and whether anything else (such as HCG) sits alongside it. The total weekly dose is usually similar across protocols. What changes most is the frequency the dose is split into, because frequency shapes how steady your levels stay between injections.
The doses and frequencies described here are common or typical patterns, shared for education. They are not a recommendation, and nothing here replaces the plan a licensed provider sets for you. For the bigger picture on how TRT works, see the full TRT guide. For technique once you have a protocol, see the TRT injection guide.
Most injectable TRT protocols sit somewhere on a spectrum from one injection per week to a small dose every day. The ester matters here. Testosterone cypionate has a half-life of roughly 8 days and enanthate roughly 4.5 days, so both can support once or twice weekly schedules. Propionate is short-acting and effectively requires every-other-day or daily injections to stay even.
Once weekly. Simplest to remember. Larger peak-to-trough swing, so some people feel a dip before the next dose.
Twice weekly, every 3.5 days. A popular middle ground that smooths the curve without much added effort.
Every other day or daily microdosing. The flattest levels, often paired with subcutaneous dosing and smaller needles.
The weekly total in each row is illustrative only (commonly somewhere in the 100 to 200 mg per week range). Your prescriber sets the actual figure.
| Protocol | Dose split | Pros | Cons | Who it tends to fit |
|---|---|---|---|---|
| Once weekly | Full weekly total in one injection, every 7 days | Simplest schedule, fewest injections, easy to remember | Largest peak-to-trough swing, possible mid-week dip, sharper estradiol and hematocrit peaks | People starting out who value simplicity and tolerate the swing well |
| Twice weekly | Half the weekly total, every 3.5 days (e.g. Mon and Thu) | Steadier levels than weekly, manageable estradiol, only two injections | Slightly more planning than weekly | A common default; people who felt a dip on weekly dosing |
| Every other day (EOD) | Weekly total divided across roughly 3 to 4 doses, every 2 days | Very stable levels, often easier estradiol and hematocrit control, small volumes suit subcutaneous | More frequent injections, more record-keeping | People sensitive to peaks, or managing high estradiol or hematocrit |
| Daily microdosing | Small fraction of the weekly total every day, usually subcutaneous | Flattest possible levels, minimal peak-trough, tiny doses | Requires daily routine and precise small-volume dosing | People chasing the steadiest curve; short esters like propionate |
| With HCG added | Any of the above, plus HCG on a separate schedule | Helps preserve testicular size and fertility while on TRT | Extra medication, separate schedule, added cost | People who want to maintain fertility or testicular function |
Testosterone therapy quiets the body's own hormonal signal to the testes, which over time can shrink them and lower sperm production. HCG (human chorionic gonadotropin) mimics that signal, keeping the testes more active.
Want the numbers behind a starting point? The HCG dose calculator can help you visualise a draw, but the prescription itself is your provider's call.
Some of the testosterone you inject converts to estradiol, a form of estrogen that men need in healthy amounts. An aromatase inhibitor lowers that conversion. It is reached for far less often than internet forums suggest.
In practice, most people on a well-dosed, appropriately spaced protocol do not need one. When estradiol does run high with genuine symptoms, the first move is often to lower the dose or inject more frequently to smooth the peaks, rather than to add a drug. An aromatase inhibitor is generally reserved for confirmed high estradiol with clear, persistent symptoms, and it is used carefully, because driving estradiol too low causes its own problems including joint aches, low libido, and poor bone health.
Bottom line: this is a prescriber's decision based on symptoms and bloodwork, never a routine add-on.
It helps to be clear about the goal a protocol is aiming at, because the two are not the same thing.
Aims to put testosterone back into a normal physiological range to treat a deficiency. This is what medically supervised TRT is for, and what this page describes.
Pushes levels beyond the normal range for performance or physique goals. That is a different undertaking from treating low testosterone, with a different risk profile, and is outside the scope of this educational page.
No protocol is complete without follow-up labs. Monitoring is how you and your prescriber confirm the dose is right and catch issues such as a rising hematocrit early. A common rhythm looks like this:
| Stage | Typical timing | Common markers |
|---|---|---|
| Baseline | Before starting | Total and free testosterone, estradiol, hematocrit, PSA where appropriate, lipids |
| Early recheck | ~6 to 12 weeks after start or after a dose change | Trough testosterone, estradiol, hematocrit to confirm the protocol is landing in range |
| Maintenance | Every 6 to 12 months once stable | Testosterone, estradiol, hematocrit, plus PSA and lipids per your provider |
Testosterone can raise hematocrit (the proportion of red blood cells in your blood). Commonly cited ceilings where clinicians take action fall in the 50 to 54 percent range. More frequent, smaller doses can help keep it steadier. Your prescriber decides what is acceptable for you and what to do if it climbs.
The 2023 TRAVERSE trial, a large randomized study of testosterone therapy in men with low testosterone and cardiovascular risk, found no excess of major adverse cardiac events with transdermal testosterone, though it did observe more atrial fibrillation. It is one data point your provider weighs alongside your own history.
For how to read and store your results, see the bloodwork guide.
Whichever protocol your prescriber sets, the hard part is running it consistently. OptiPin logs each dose, keeps you on schedule for once-weekly through daily protocols, tracks HCG on its own cadence, rotates injection sites, and stores your bloodwork so the trend is in one place. To turn a target weekly total into a per-injection volume, the TRT dose calculator does the arithmetic for you.
Common questions about TRT protocols
Log every dose, stay on schedule from weekly to daily, track HCG separately, rotate sites, and keep your bloodwork in one place - all private and on-device.
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