Ipamorelin Dosage: Complete Guide to Protocols, Timing & Cycling

Getting ipamorelin dosage right matters more than most people realize. Too little and you won’t move the needle on GH levels. Too much and you’re wasting peptide without additional benefit — ipamorelin’s GH response hits a ceiling at higher doses [1].

This is one of the most commonly prescribed peptides in peptide therapy for GH optimization, and its dosing is well-characterized in clinical pharmacology studies. If you’re considering adding ipamorelin to a peptides for muscle growth protocol, here’s what the data actually supports.

Key Takeaways

• Standard clinical dose is 200-300mcg per injection, administered 1-3 times daily via subcutaneous injection [1][2]
• GH release is dose-dependent up to a ceiling — doses above 1mcg/kg body weight show diminishing returns [2]
• Timing matters: inject on an empty stomach, ideally before bed or post-workout for maximum GH pulse [3]
• Standard cycling is 8-12 weeks on, 4 weeks off to prevent pituitary desensitization

Table of Contents

1. What Clinical Studies Used
2. Standard Dosing Protocol
3. Body Weight Adjustments
4. Timing Your Injections
5. Cycling: On and Off Periods
6. Stacking With CJC-1295
7. How to Reconstitute Ipamorelin
8. Dose Adjustments for Different Goals
9. Signs You Need to Adjust Your Dose
10. FAQ
11. Sources

What Clinical Studies Used

The foundational pharmacokinetic study on ipamorelin tested doses ranging from 1mcg/kg to 100mcg/kg in healthy human volunteers [2]. The key findings:

• GH release was dose-proportional at lower doses
• The pharmacokinetic half-life was approximately 2 hours
• Clearance was 0.078 L/h/kg with a volume of distribution of 0.22 L/kg at steady state
• Maximum GH response plateaued at higher doses, confirming a ceiling effect

In Raun et al.’s landmark selectivity study, ipamorelin produced dose-dependent GH release comparable to GHRP-6, with an ED50 of 80 nmol/kg in animal models [1]. The critical finding was that even at doses 200 times the minimum effective amount, ipamorelin didn’t raise cortisol or prolactin.

The clinical surgical trials used IV doses of 0.01-0.03 mg/kg for postoperative recovery [4]. These IV doses aren’t directly comparable to the subcutaneous protocols used in performance and anti-aging medicine, but they confirm the safety window is wide.

Standard Dosing Protocol

The standard clinical protocol prescribed by most peptide therapy clinicians:

Starting dose: 200mcg per injection Maintenance dose: 200-300mcg per injection Frequency: 1-3 times daily Route: Subcutaneous injection (abdomen, thigh, or upper arm)

Most new users start at 200mcg once daily (typically before bed) for the first 1-2 weeks. This allows you to assess tolerance and identify any ipamorelin side effects before increasing frequency.

After the initial period, many protocols move to 200-300mcg twice daily — once in the morning (fasted) and once before bed. Three-times-daily protocols (morning, post-workout, bedtime) are used for more aggressive GH optimization but aren’t necessary for most people.

The sweet spot for most users: 200-300mcg twice daily. This provides substantial GH elevation throughout the day while staying well within the dose range that maintains ipamorelin’s clean selectivity profile [1].

Body Weight Adjustments

Ipamorelin’s clinical pharmacology data is weight-based (mcg/kg), but clinical practice has largely moved toward flat dosing in the 200-300mcg range. Here’s why both approaches have merit:

Weight-Based Dosing

Based on the PK/PD modeling [2]:

Body Weight	Conservative (1mcg/kg)	Standard (2-3mcg/kg)	Aggressive (4mcg/kg)
60kg (132lb)	60mcg	120-180mcg	240mcg
80kg (176lb)	80mcg	160-240mcg	320mcg
100kg (220lb)	100mcg	200-300mcg	400mcg

Flat Dosing

Most clinicians prescribe a flat 200-300mcg regardless of body weight. For individuals under 150lb, starting at 150-200mcg is reasonable. For those over 220lb, doses up to 300-400mcg may be warranted.

The practical difference between weight-based and flat dosing is small at the standard range. The GH response curve flattens at higher doses, so a 180lb person taking 200mcg and a 220lb person taking the same dose will both get meaningful GH elevation [2].

Timing Your Injections

When you inject ipamorelin matters almost as much as how much you inject. Two factors drive timing:

Food and Insulin

Elevated blood sugar and insulin blunt the GH response to secretagogues [5]. This is well-established physiology, not ipamorelin-specific. For maximum GH pulse:

• Inject at least 30-60 minutes before eating
• Or inject 2-3 hours after your last meal
• Avoid high-carb meals in the hour before injection

Aligning With Natural GH Peaks

Your body’s largest natural GH pulse happens during the first 90 minutes of deep sleep [3]. Injecting ipamorelin 20-30 minutes before bed amplifies this natural peak rather than working against it.

Optimal timing protocols:

• Once daily: 20-30 minutes before bed, on an empty stomach
• Twice daily: Morning (fasted, 30 min before breakfast) + before bed
• Three times daily: Morning fasted + post-workout (2+ hours after last meal) + before bed

The bedtime dose is the highest priority. If you can only inject once per day, make it the evening dose. This aligns with the same physiology that makes peptides for sleep work — GH and deep sleep are tightly linked.

Cycling: On and Off Periods

Standard Cycling Protocol

• On cycle: 8-12 weeks
• Off cycle: 4 weeks
• Then repeat

The off period serves two purposes. First, it prevents potential pituitary desensitization — though ipamorelin shows less desensitization risk than other GHRPs due to its selectivity [1]. Second, it allows you to assess your baseline and determine how much of your progress is peptide-dependent.

Extended Protocols

Some anti-aging clinicians prescribe longer cycles — up to 6 months at conservative doses (150-200mcg once daily). The rationale: lower doses produce less pituitary stress, and the anti-aging benefits of sustained mild GH elevation may warrant longer exposure.

Long-term safety data beyond 12-18 months of continuous use is limited. Until more data exists, cycling remains the standard recommendation.

When to Start and Stop

Starting a cycle: Begin at once daily for 1-2 weeks, then increase to your target frequency. This gives you a clear picture of individual response.

Ending a cycle: You can stop abruptly. Ipamorelin doesn’t suppress natural GH production the way exogenous HGH does, so there’s no “crash” or need for post-cycle therapy. Your GH levels simply return to baseline over a few days.

Stacking With CJC-1295

The most common ipamorelin protocol isn’t ipamorelin alone — it’s the CJC-1295 + ipamorelin stack. The two peptides work through complementary mechanisms:

• CJC-1295 (mod GRF 1-29) acts on the GHRH receptor, providing the “signal” to release GH
• Ipamorelin acts on the ghrelin receptor, amplifying the pituitary’s response to that signal and suppressing somatostatin’s brake

When combined, the GH release is synergistic — meaning the combined effect is greater than either peptide alone [6].

Stack Dosing

Component	Dose	Frequency
CJC-1295 no DAC (mod GRF 1-29)	100-200mcg	Same injection as ipamorelin
Ipamorelin	200-300mcg	1-3x daily

Both peptides can be drawn into the same syringe. The typical protocol is 100mcg CJC-1295 + 200-300mcg ipamorelin, injected together.

For more on the benefits of CJC-1295 in this stack, and how to manage CJC-1295 side effects, see those dedicated guides.

CJC-1295 with DAC is a different product with a much longer half-life (6-8 days). It’s injected once or twice weekly, not daily. If your clinician prescribes the DAC version, the protocol is entirely different from the no-DAC version commonly stacked with ipamorelin.

How to Reconstitute Ipamorelin

Ipamorelin comes as a lyophilized (freeze-dried) powder that needs to be mixed with bacteriostatic water before injection. If you’re new to this process, our how to reconstitute peptides guide covers the full procedure.

Quick Reconstitution Reference

Standard vial: 5mg ipamorelin powder

Step 1: Draw 2mL of bacteriostatic water into an insulin syringe.

Step 2: Inject the water slowly into the vial, aiming the stream at the glass wall — not directly onto the powder. Let it run down the side.

Step 3: Gently swirl (don’t shake) until fully dissolved. The solution should be clear and colorless.

Step 4: Store reconstituted vial in the refrigerator (36-46°F / 2-8°C). Use within 25-30 days.

Dosing Math

With 5mg in 2mL:

• 200mcg = 8 units (0.08mL) on an insulin syringe
• 250mcg = 10 units (0.10mL)
• 300mcg = 12 units (0.12mL)

A 5mg vial at 200mcg per dose gives you 25 doses. At twice daily, that’s about 12-13 days per vial. Plan your supply accordingly for an 8-12 week cycle.

For detailed injection technique, see our how to inject peptides guide.

Dose Adjustments for Different Goals

Anti-Aging / Wellness

• Dose: 150-200mcg
• Frequency: Once daily (before bed)
• Cycle: 8-12 weeks on, 4 weeks off
• Notes: Conservative approach focused on sleep quality, skin health, and recovery. Pairs well with the ipamorelin benefits most associated with sustained mild GH elevation.

Body Composition / Fat Loss

• Dose: 200-300mcg
• Frequency: Twice daily (morning fasted + before bed)
• Cycle: 12 weeks on, 4 weeks off
• Notes: GH’s lipolytic effects are dose-dependent. The twice-daily protocol maintains elevated GH/IGF-1 throughout the day. Often combined with CJC-1295 for a synergistic effect on fat loss.

Muscle Growth / Performance

• Dose: 300mcg
• Frequency: 2-3 times daily (morning + post-workout + before bed)
• Cycle: 8-12 weeks on, 4 weeks off
• Notes: The three-times-daily protocol maximizes total daily GH exposure. Post-workout timing takes advantage of the exercise-induced GH pulse. See our peptides for muscle growth guide for complementary strategies.

Recovery / Healing

• Dose: 200-300mcg
• Frequency: Twice daily
• Cycle: Until recovery goals are met (typically 8-16 weeks)
• Notes: GH and IGF-1 are directly involved in tissue repair. Consistent dosing matters more than peak dose for recovery applications. Consider pairing with best peptides for recovery like BPC-157 or TB-500.

Signs You Need to Adjust Your Dose

Dose May Be Too Low

• No change in sleep quality after 2-3 weeks
• No noticeable recovery improvement
• Morning GH/IGF-1 bloodwork shows minimal change from baseline

Dose May Be Too High

• Persistent water retention (mild puffiness in hands or face)
• Numbness or tingling in fingers (sign of fluid retention pressing on nerves)
• Vivid dreams or sleep disruption (GH pulse may be too large)
• Headaches in the first 1-2 hours after injection

These side effects are typically mild and dose-dependent. Reducing by 50-100mcg per injection usually resolves them. For a full overview of what to watch for, see our ipamorelin side effects guide.

Blood Work Monitoring

If possible, get baseline IGF-1 levels before starting and recheck at 6-8 weeks. Target a 20-40% increase in IGF-1 from your baseline — this indicates meaningful GH elevation without excessive stimulation.

Total IGF-1 in the 200-350 ng/mL range is generally the clinical target for adults using GH secretagogues. Values consistently above 400 ng/mL may warrant dose reduction.

FAQ

What is the best ipamorelin dosage for beginners?▼

Start with 200mcg once daily, injected 20-30 minutes before bed on an empty stomach. This is the most conservative effective dose. After 1-2 weeks, if you tolerate it well, you can add a morning fasted dose. Most people don’t need more than 200-300mcg twice daily.

Can you take ipamorelin every day?▼

Yes, during an on-cycle. Ipamorelin is designed for daily use — the short half-life (about 2 hours) means each injection creates a discrete GH pulse that clears quickly [2]. This is different from exogenous HGH, which provides sustained elevation. However, you should cycle off every 8-12 weeks for a 4-week break.

How long does it take for ipamorelin to work?▼

Most people notice sleep improvements within the first 1-2 weeks. Body composition changes (fat loss, muscle recovery) typically become apparent at 6-8 weeks. Full results for muscle growth and anti-aging benefits usually require 3-6 months of consistent cycling.

Do I need a prescription for ipamorelin?▼

Yes. Since the FDA’s peptide reclassification in 2026, ipamorelin requires a prescription from a licensed provider and must be obtained from a compounding pharmacy. Many telehealth peptide clinics can prescribe it remotely after a consultation.

What happens if I miss a dose?▼

Skip it and continue with your next scheduled dose. Don’t double up. Ipamorelin works by creating individual GH pulses — missing one dose won’t significantly impact your overall results. Consistency over weeks matters far more than any single injection.

Sources

1. Raun K, et al. Ipamorelin, the first selective growth hormone secretagogue. Eur J Endocrinol. 1998;139(5):552-561. PubMed

2. Johansen PB, et al. Pharmacokinetic-pharmacodynamic modeling of ipamorelin, a growth hormone releasing peptide, in human volunteers. Pharm Res. 1999;16(9):1412-1416. Springer

3. Van Cauter E, et al. Interrelationships between growth hormone and sleep. Growth Horm IGF Res. 2000;10(Suppl B):S57-62. PubMed

4. Greenwood-Van Meerveld B, et al. Ipamorelin, a ghrelin mimetic, accelerates gastric emptying in a rat model of postoperative ileus. J Pharmacol Exp Ther. 2007;321(1):391-399.

5. Lanzi R, et al. Elevated insulin levels contribute to the reduced growth hormone response to growth hormone-releasing hormone in obese subjects. Metabolism. 1999;48(9):1152-1156.

6. Bowers CY. Synergistic release of growth hormone by GHRP and GHRH. J Pediatr Endocrinol. 1993;6(3-4):325-331.