---
title: "GHRP and GHRH Peptides: Ipamorelin and CJC-1295"
description: "Stimulating natural GH: how the GHRP+GHRH stack works, Ipamorelin and CJC-1295 protocols, injection timing."
lang: en
dateModified: 2026-05-23
canonical: https://anaprotokol.com/en/guides/ghrp-ghrh-peptides-guide
---

# GHRP and GHRH Peptides: Ipamorelin and CJC-1295

**GHRP and GHRH peptides** are the endogenous alternative to exogenous growth hormone: rather than injecting GH, you stimulate its release from the pituitary. The GHRP + GHRH stack co-injected is the reference protocol — it amplifies the natural pulse without disconnecting hormonal regulation. It is a well-tolerated, affordable family, suited for recovery, sleep and muscle-quality use.

This guide details the two major compounds ([Ipamorelin](/en/molecule/ipamorelin) and [CJC-1295](/en/molecule/cjc1295)), injection timing, doses, and the place of this stack relative to [exogenous HGH](/en/guides/hgh-bodybuilding-guide). For general peptide framing, see the [peptides for bodybuilding](/en/guides/peptides-for-bodybuilding) guide.

## The principle: amplifying the endogenous GH pulse

Growth hormone is naturally released from the pituitary in pulses — not continuously — triggered by two complementary pathways. The GHRH (Growth Hormone Releasing Hormone) pathway is the main release signal; the ghrelin/GHRP pathway reinforces and triggers an additional pulse. It is the interaction of both pathways that produces physiological pulses (notably the deep-sleep pulse and the post-workout one).

The peptides used in bodybuilding mimic these two pathways:

- **GHRP (Ipamorelin, GHRP-2, GHRP-6).** Ghrelin mimetics. They trigger a GH pulse by binding to the ghrelin receptor in the pituitary [5].
- **GHRH (CJC-1295, Mod GRF 1-29, Sermorelin, Tesamorelin).** Analogs of natural GHRH. They stimulate GH release by binding to the GHRH receptor in the pituitary.
- **GHRP + GHRH co-injection.** Marked synergy: the GH pulse obtained is several times higher than the sum of individual effects. This is the practical protocol.

> Advantage of this approach over exogenous HGH: the pulse remains regulated by physiological feedback. The body does not receive a continuous artificial GH signal, but amplified pulses that stay within the normal functional frame. Downside: smaller effect than well-dosed HGH — you are talking about improved recovery and sleep, not spectacular mass gains.

## Ipamorelin: the reference GHRP

[Ipamorelin](/en/molecule/ipamorelin) is the most selective and best tolerated GHRP. Its distinguishing trait relative to its predecessors (GHRP-6, GHRP-2) lies in its clean profile:

- **No cortisol spike.** GHRP-6 and GHRP-2 at high dose also stimulate cortisol and prolactin release — Ipamorelin does not at usual doses [2].
- **No prolactin spike.** Practical consequence: no prolactin-driven gyno risk, unlike older GHRPs.
- **No major hunger effect.** GHRP-6 strongly stimulates appetite (marked ghrelin effect) — Ipamorelin much less.
- **Short half-life (~2 h).** Means several injections per day for continuous effect, but preserves the physiological pulsatile character.

### Ipamorelin dosing

| Profile | Per injection | Daily frequency |
| --- | --- | --- |
| Peptide beginner | 200 mcg | 2× / day (fasted + bedtime) |
| Standard | 200–300 mcg | 3× / day (fasted + pre-workout + bedtime) |
| Advanced | 300 mcg | 3× / day |

Beyond 300 mcg per injection, the GH pulse no longer increases significantly (receptor saturation). No point going higher — better to multiply daily injections than unit doses.

## CJC-1295: the GHRH to pick with or without DAC

[CJC-1295](/en/molecule/cjc1295) exists in two versions with very different behaviors:

- **CJC-1295 without DAC (Mod GRF 1-29).** Very short half-life (~30 min). To be injected with each GHRP dose. It is the physiological version, which amplifies the pulse at the moment the GHRP triggers it. Well-documented safety profile.
- **CJC-1295 with DAC (Drug Affinity Complex).** Long half-life (~8 days) thanks to binding to albumin. One injection per week is enough [3]. Downside: GH is no longer pulsatile but in a sustained plateau ('GH bleed'), which steps outside the physiological frame and may desensitize over time. Less used today in advanced protocols.

### CJC-1295 dosing (without DAC)

| Profile | Per injection | Daily frequency |
| --- | --- | --- |
| Standard | 100 mcg | Co-injected with each GHRP (2 to 3× / day) |
| Advanced | 100–200 mcg | 3× / day with GHRP |

> For the large majority of users, CJC-1295 without DAC is the right pick: it preserves the pulsatile character, avoids desensitization, and the benefit/risk ratio is more favorable. The DAC version remains a niche choice (use simplicity) with a biological trade-off worth reflecting on.

## GHRP + GHRH stack: the reference protocol

The classic stack combines 200 to 300 mcg of Ipamorelin and 100 mcg of CJC-1295 without DAC, co-injected subQ, 2 to 3 times per day. The synergy produces a GH pulse several times higher than that obtained with each compound alone. It is the base of all modern secretagogue protocols.

### Injection timing: three physiological windows

1. **Fasted morning.** Before breakfast. Leverages low blood glucose — high carbs at pulse time significantly reduce GH release (insulin antagonizes GH).
2. **Pre-workout.** 30 to 45 minutes before the session. The GH pulse adds to the one naturally triggered by intense exercise, amplifying recovery and lipolysis.
3. **Bedtime.** Before sleep, ideally 2 to 3 hours after the last meal. Reinforces the nocturnal GH pulse tied to deep sleep — the most important window for recovery.

> The fasting rule around injection is essential. An injection right after a carb-rich meal can divide the obtained GH pulse by 2 to 3. If timing forces an injection shortly after a meal, prioritize protein/fats over carbs in the preceding 2 to 3 hours.

## Expected effects: recovery, sleep, mild lipolysis

GH secretagogues do not produce spectacular mass gains — their value is elsewhere. What is typically observed on a 12-week protocol at standard doses:

- **Sleep quality.** Deeper sleep, more vivid dreams, sense of more complete nocturnal recovery. Effect often perceptible in the first 2 to 4 weeks.
- **Recovery between sessions.** Reduced soreness, closer-together sessions better tolerated. Useful effect during intense training phases.
- **Mild lipolysis.** Slight fat loss notably in the abdominal area — less marked than with HGH but real over 8 to 12 weeks in a modest caloric deficit.
- **Skin and joint quality.** Mild anti-aging effect, joints feel more lubricated.
- **IGF-1 moderately up.** Typically +20 to +50% relative to baseline — much less than with HGH, but without the marked metabolic effects.

The stack is useful post-cycle (recovery), during steroid cycles (muscle-quality synergy), or standalone (anti-aging, quality of life). It is not relevant for users chasing short-term mass gain — other families answer that need better.

## Side effects: limited but not nonexistent

- **Transient facial flush.** Face redness and warmth in the minutes following the injection, especially early in use. Benign, fades over time.
- **Mild numbness / tingling in the hands.** Linked to water retention, possible at high dose. Regresses on lowering.
- **Mild increased hunger (modest with Ipamorelin).** Residual ghrelin effect — unrelated to the massive 'hunger' effect of GHRP-6.
- **Mild post-injection lethargy.** May justify avoiding injection right before an activity requiring sharp alertness.

At standard doses, GH secretagogues are among the best-tolerated compounds in the field. No HPTA suppression, no aromatization, no hepatotoxicity, no particular cardio precaution at physiological doses [4]. Relevant monitoring stays glucose/HbA1c and IGF-1 for extended use (beyond 12 weeks).

## Reconstitution and injection

Peptides arrive in a lyophilized vial (powder). Reconstitution with bacteriostatic water directly conditions product efficacy — tap water or non-bacteriostatic sterile water reduces post-reconstitution shelf life to a few days.

- BAC water: 2 to 4 weeks refrigerated after reconstitution.
- Insulin syringes (29 to 31 G, 0.5 ml or 1 ml) with IU graduations (1 IU = 0.01 ml) — eases precise dosing.
- SubQ injection (abdomen, thigh) with site rotation.
- Storage: lyophilized vial in freezer or refrigerator; reconstituted vial only in refrigerator.
- Standard aseptic technique: alcohol on the vial stopper, on the skin, sterile single-use syringe.

See the [how to inject guide](/en/guides/how-to-inject-steroids) for the basics (sites, rotation, asepsis), and the [gear storage guide](/en/guides/gear-storage-and-quality) for stock management.

## FAQ

### Do you need on/off cycles with this stack?

At standard doses and with CJC-1295 without DAC that preserves the pulsatile character, continuous use over several months is possible without marked desensitization. A 12-week stack cycle, followed by a 4 to 8-week break, is a prudent approach that maintains long-term pituitary sensitivity. With CJC-1295 with DAC (GH plateau), desensitization is documented from 3 to 6 months and forces breaks.

### Can secretagogues and exogenous HGH be combined?

Theoretically yes but in practice value is limited: exogenous HGH inhibits the endogenous GH pulse via negative feedback, which largely cancels the secretagogue contribution. The choice is rather one or the other: secretagogues for physiological amplification and moderate cost, [HGH](/en/guides/hgh-bodybuilding-guide) for maximum effect and predictability, at a much higher cost.

### What is the difference between Ipamorelin, GHRP-2 and GHRP-6?

Ipamorelin is the most selective — it triggers the GH pulse without significantly raising cortisol or prolactin [2]. GHRP-2 is more potent in terms of GH release but raises cortisol/prolactin at high dose. GHRP-6 is even more potent on GH but very strongly stimulates appetite (marked ghrelin effect) and raises cortisol/prolactin. For most modern protocols, Ipamorelin is the right pick: clean profile and good efficacy at usual doses.