Ipamorelin's "minimum effective dose" was never actually written down

Ask ten peptide forums what dose of ipamorelin to start at and you get numbers spread across an order of magnitude. 100 micrograms. 200. 300 three times a day. Someone will quote "5 mg" with total confidence. There is no consensus, and there is no clinical body publishing one. For a compound never approved for this use, the protocol is whatever the last confident post said it was.

That is the actual state of ipamorelin dosing in 2026. Worth being honest about before anyone injects anything.

What ipamorelin actually is

Ipamorelin is a growth hormone secretagogue. It does not supply growth hormone. It binds the ghrelin / GH-secretagogue receptor and signals the pituitary to release a pulse of the GH the body already makes. Among the GHRP family it is the selective one: in the literature it reads as clean of the cortisol, prolactin, ACTH, FSH, LH, and TSH effects that dirtier secretagogues carry. Its development code was NNC 26-0161. Evidence for the GH and IGF-1 bump in humans is moderate. Evidence for the downstream outcomes people actually want, body composition and recovery, is weak.

That selectivity is why it is popular. It is not why anyone knows the right dose.

The range people actually quote

Here is where the numbers land. None of this is medical advice, it is what community guides report, and the evidence behind them is anecdotal:

• Minimalist: 100 to 125 micrograms per dose. The argument is diminishing returns above that.
• Standard: 200 micrograms, once a day, five days a week, injected subcutaneously.
• Aggressive: 200 to 300 micrograms up to three times a day, spaced four or more hours apart.

Notice the spread. The top of the aggressive range is roughly six times the minimalist dose, and there is no trial telling you which end fits a given person. The "minimum effective dose" is undocumented art here, not a settled number, and finding it is left entirely to the user.

Where the "5 mg" number comes from

That "5 mg" someone quotes is almost always a misread. A blend vial labeled "5 mg ipamorelin + 5 mg Mod-GRF" is the total peptide in the whole vial, reconstituted and spread across many doses, not a single injection. People see the vial label and think it is a dose. It is off by a factor of twenty-five or more. The discipline the guides stress: do the math on one peptide at a time, per injection, never on the combined label weight.

This is the kind of error that self-directed dosing produces, and it is why a range this wide is dangerous without someone checking the arithmetic.

Ipamorelin is half a protocol

Ipamorelin is a GHRP. Guides pair it with a GHRH, usually Mod-GRF (1-29). Solo works, but the combo amplifies the pulse. Mod-GRF alone reportedly delivers around five times the GH pulse of ipamorelin by itself, so low-dose combinations tend to be more cost-effective than loading either one on its own. The timing the guides converge on: fasted, at least two to three hours after food, and before sleep, because insulin blunts GH release and somatostatin (which blocks GH) runs lower at night.

The part the dose charts skip

Two things matter more than the exact microgram count, and both belong with a clinician, not a forum.

Allergic reactions are real. Flushing, hot skin, itchiness, heart palpitations: community consensus treats these as warning signs, not evidence "it is working." The old framing that a bit of flushing is a good sign is dismissed by experienced users. Starting at the lowest dose is partly about catching a reaction while it is small, and stopping if one appears.

Insulin resistance is the standing cost. GH secretagogues worsen insulin sensitivity and can raise A1C. Anyone pre-diabetic needs monitoring. There is also a prudent case for watching PSA on any GH-axis protocol, after at least one documented case of a secretagogue spiking it in a hyper-responder who reverted once he stopped.

So what is the minimum effective dose?

Nobody has published one. The honest answer is a low starting point a clinician signs off on and watches, not a number copied from a thread. That gap is the whole problem the angle names: guides hand you a range, not a dose for your body, and the distance between the two is where people get hurt or waste money.

Two things make the range safer to reason about. A baseline measurement first is what lets anyone tell whether a dose did anything at all; without one, the entire self-titration is guesswork. And the dose debate is moot if the powder is not what the label claims, so the vial gets vetted before the number on it is trusted.

More of how we think about protocols and sourcing is on the blog feed. If you are working out whether a supplier is real, start with how to vet one and whether a lab test is worth paying for. And before you trust any dose, measure a baseline, because a protocol you cannot measure is a protocol you cannot judge.