Ipamorelin Dosage: A Complete 2026 Guide to Doses, Timing, and Protocol

Most ipamorelin protocols reported in research and clinical settings use 100 to 300 micrograms (mcg) per dose, given as a subcutaneous injection one to three times a day. A common single dose is 200 to 300 mcg, often taken at night on an empty stomach. Ipamorelin is a selective growth-hormone peptide with a short half-life of about two hours, so each dose is meant to create one clean GH pulse. Any real dose should be set by a licensed physician, not copied from a forum.

What is a standard ipamorelin dosage?

A standard ipamorelin dosage reported in research and clinician protocols is 100 to 300 micrograms (mcg) per dose, injected under the skin one to three times a day. The most common single dose is 200 to 300 mcg, and many protocols use it once nightly. Ipamorelin is a synthetic pentapeptide and a selective growth-hormone (GH) secretagogue, so the goal of a dose is to trigger one natural-looking GH pulse from the pituitary gland.

These numbers describe what studies and clinics report. They are not a prescription. Ipamorelin has never been FDA-approved for human use, and a real dose depends on your labs, weight, goals, and medical history, which is why a physician sets it. If you are comparing GH peptides, the growth hormone peptides guide puts ipamorelin next to sermorelin, CJC-1295, and tesamorelin.

How does ipamorelin work in the body?

Ipamorelin works by binding the ghrelin receptor (GHS-R1a) on somatotroph cells in the anterior pituitary, which signals a short, pulsed release of growth hormone. It is called the first truly selective GH secretagogue because, in the foundational 1998 research, it raised GH without meaningfully raising cortisol, prolactin, or ACTH. That selectivity is the main reason people find it interesting.

The peptide has an elimination half-life of about two hours. GH tends to rise within 15 to 30 minutes of an injection and peak around 60 to 90 minutes later, then fade. That short window is why timing and frequency matter so much for ipamorelin dosing.

What are the common ipamorelin dose ranges?

Common ipamorelin dose ranges cluster between 100 and 300 mcg per injection, with the timing and frequency chosen to fit a person's goal. The table below shows patterns reported in research and clinician protocols. Treat it as a reference for understanding the peptide, not as instructions to follow on your own.

For a fuller walkthrough of the molecule itself, see the ipamorelin guide. For the combined protocol, see the CJC-1295 and ipamorelin stack.

When and how is ipamorelin injected?

Ipamorelin is injected subcutaneously, meaning into the fat just under the skin, usually in the abdomen. Most protocols place a dose at night before sleep because that lines up with the body's largest natural GH pulse. Some add a dose after training.

Timing around food matters. Carbohydrates and fat blunt the GH response, so protocols typically call for dosing on a relatively empty stomach, often 2 to 3 hours after eating and without food for 20 to 30 minutes afterward. The peptide is reconstituted from powder with bacteriostatic water and drawn into an insulin syringe.

• Site: subcutaneous, usually the lower abdomen, rotating spots
• Best window: bedtime, on a relatively empty stomach
• Food rule: avoid carbs and fat right around the dose
• Tools: small insulin syringe; the vial is stored cold once mixed

How do you titrate and cycle ipamorelin?

Titration means starting low and adjusting slowly. For ipamorelin, that usually looks like beginning near 100 to 200 mcg once nightly, staying there long enough to judge sleep and recovery, and only then considering a small increase or a second daily dose. Because of the bell-shaped dose-response, climbing past roughly 300 mcg per dose rarely adds benefit.

Cycling is common. Many protocols run ipamorelin for a defined block of weeks, then pause, to keep the pituitary responsive. The exact length and any breaks are clinical decisions that depend on your labs and how you respond, which is another reason a prescriber should own the schedule rather than a generic online chart.

• Start low: a single small nightly dose
• Hold before adjusting: give it real weeks, not days
• Cap sensibly: bigger is not better past the curve's peak
• Cycle: defined blocks with breaks, set by a physician

Why is ipamorelin stacked with CJC-1295?

Ipamorelin is often stacked with CJC-1295 because the two work through different doors and complement each other. Ipamorelin is a ghrelin-receptor agonist that fires a sharp, immediate GH pulse, while CJC-1295 is a GHRH analogue that raises the baseline GH signal over a longer window. Together, a common nightly protocol pairs about 200 mcg ipamorelin with about 100 mcg CJC-1295.

The idea is a stronger, more natural-looking GH release than either peptide alone, while still preserving the body's own feedback loops. The CJC-1295 and ipamorelin stack page covers the combined protocol in detail, and the CJC-1295 dosage page covers that peptide on its own.

What are ipamorelin's side effects at these doses?

Ipamorelin's reported side effects are usually mild and tied to how much and how often it is dosed. The most common are injection-site redness, a brief flushing or head-rush feeling, water retention, and a temporary rise in hunger from ghrelin-receptor activity. Because ipamorelin is selective, research reports little to no rise in cortisol or prolactin, which sets it apart from older secretagogues like GHRP-6.

Higher doses can bring tingling, numbness, or fluid-related joint discomfort. Ipamorelin is also on the World Anti-Doping Agency prohibited list, so it is off-limits for tested athletes. Anyone with a history of cancer or active tumors should not use GH-raising peptides without direct physician oversight, since GH and IGF-1 can influence cell growth. The ipamorelin guide and sermorelin side effects pages go deeper on safety.

Why do grey-market ipamorelin vials carry real risk?

Grey-market ipamorelin is the one place where the caution genuinely belongs. Vials sold online as research chemicals or not-for-human-use come with no prescriber, no pharmacy quality checks, and no accountability for what is actually in the bottle. Independent testing of that market has repeatedly found underdosed, contaminated, or mislabeled product.

• No prescriber means no one is checking the dose against your health
• "Research-grade" or "not for human use" labels exist to dodge regulation, not to protect you
• Purity and sterility are unverified, so contamination is a live risk
• There is no recourse if the vial is wrong

A pharmacy-grade peptide is a different thing entirely: it is compounded by a licensed 503A pharmacy after a physician writes a prescription. That is the standard pru is built around.

How does pru handle growth-hormone peptides?

pru is a telehealth platform where licensed physicians prescribe and FDA-regulated 503A pharmacies compound and fill. You select the peptide, guided by pru's content, and the physician confirms whether it fits you. pru's live growth-hormone peptide today is sermorelin, a GHRH analogue in the same family as ipamorelin.

Ipamorelin itself is working its way through the FDA's PCAC compounding review, the same process deciding the near-term path for many peptides. While that plays out, pru's growth-hormone offering is sermorelin, and the sermorelin vs ipamorelin page explains how the two compare. Pricing is at cost: a flat membership funds the platform, and the medicine is billed at the pharmacy fill plus supplies, shipping, and consult, with no markup on the peptide.

As the dose rises the medicine can cost a little more, but never carries a member markup. Looking into growth-hormone peptides at all means you are already thinking ahead about how you recover and age, and pru exists to make that informed choice the accessible one, with licensed physicians and pharmacy-grade medicine at cost. Browse the Muscle & Performance category to see what is live, and talk to a pru physician when you are ready.

Related reading

• Ipamorelin guide: what it is and what it does
• Sermorelin vs ipamorelin: how they compare
• CJC-1295 and ipamorelin stack explained
• Growth hormone peptides: a complete guide
• Sermorelin dosage: doses and titration
• See pru's sermorelin

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