Growth Hormone Peptides Compared: Which Is Right for You?

January 25, 2026

Overview

Growth hormone peptides stimulate your pituitary gland to produce and release more growth hormone rather than directly injecting synthetic HGH. This approach preserves the body's natural pulsatile GH pattern and generally carries fewer side effects. However, there are many GH peptides to choose from, each with different mechanisms, side effect profiles, and ideal use cases. This guide covers the eight most popular options.

The GHRH Analogs (Amplifiers)

These peptides mimic growth hormone-releasing hormone. They amplify GH pulses but cannot trigger them independently — they work best when combined with a GHRP.

CJC-1295 (no DAC / Modified GRF 1-29): The most popular GHRH analog. Half-life of ~30 minutes. Clean, minimal side effects. Almost always paired with Ipamorelin. Dose: 100 mcg 2-3x daily.

Sermorelin: The original GH peptide — once FDA-approved for pediatric GH deficiency. Shorter half-life than CJC-1295. Gentler and often recommended as a starting point for anti-aging. Dose: 200-300 mcg once daily before bed.

Tesamorelin: FDA-approved for HIV-associated lipodystrophy. The most potent GHRH analog with the most clinical data. Specifically effective for reducing visceral fat. Dose: 2 mg subcutaneously daily. More expensive than other options.

The GHRPs (Triggers)

These bind to ghrelin receptors and trigger GH release. They can initiate a GH pulse on their own and are amplified when combined with a GHRH analog.

Ipamorelin: The gold standard GHRP. Most selective — minimal impact on cortisol, prolactin, and appetite. Dose: 200-300 mcg 2-3x daily. Best for: anyone prioritizing a clean side effect profile.

GHRP-2: Stronger GH release than Ipamorelin but increases cortisol and prolactin to a moderate degree. Also raises appetite. Dose: 100-300 mcg 2-3x daily. Best for: people who want stronger GH release and do not mind increased hunger.

GHRP-6: The most potent appetite stimulator of all GHRPs. Strong GH release but significant cortisol and prolactin elevation. Dose: 100-300 mcg 2-3x daily. Best for: hard-gainers who want maximum appetite stimulation alongside GH release.

Hexarelin: The strongest GHRP for raw GH output. However, it causes the most rapid receptor desensitization — effectiveness drops significantly after 4-8 weeks. Also raises cortisol and prolactin more than other GHRPs. Best for: short, targeted cycles when maximum GH release is needed temporarily.

The Oral Option

MK-677 (Ibutamoren): Not technically a peptide but a non-peptide ghrelin mimetic. Its main advantage is oral availability — no injections required. It provides 24-hour GH elevation with a single daily dose.

Dose: 10-25 mg orally once daily. Side effects include significant appetite increase, water retention, and reduced insulin sensitivity with chronic use. It does not desensitize as quickly as injectable GHRPs.

Best for: people who want GH optimization without injections, or as a convenient addition to an injectable stack. Worst for: anyone trying to lose fat (the appetite increase can be counterproductive) or those with insulin resistance concerns.

Quick Comparison Table

Ipamorelin — GH release: moderate, appetite increase: minimal, cortisol/prolactin: minimal, desensitization: slow. Best all-round choice.

CJC-1295 — GH release: moderate (amplifier), appetite: none, cortisol/prolactin: none, desensitization: slow. Best GHRH to pair with a GHRP.

Sermorelin — GH release: mild-moderate, appetite: none, cortisol/prolactin: none, desensitization: slow. Gentlest option, good starting point.

Tesamorelin — GH release: strong, appetite: minimal, cortisol/prolactin: minimal, desensitization: slow. Most clinical data, FDA-approved.

GHRP-2 — GH release: strong, appetite: moderate, cortisol/prolactin: moderate, desensitization: moderate.

GHRP-6 — GH release: strong, appetite: very strong, cortisol/prolactin: moderate-high, desensitization: moderate.

Hexarelin — GH release: very strong, appetite: moderate, cortisol/prolactin: high, desensitization: fast (4-8 weeks).

MK-677 — GH release: strong (24hr), appetite: very strong, cortisol/prolactin: minimal, desensitization: very slow. Oral dosing.

Recommended Starting Points

For anti-aging and general wellness: Sermorelin 200-300 mcg before bed, or CJC-1295 + Ipamorelin if you prefer twice-daily dosing.

For body composition and recovery: CJC-1295 + Ipamorelin is the standard. Add post-workout and morning doses alongside the pre-bed dose.

For maximum GH output (short-term): Hexarelin or GHRP-2 combined with CJC-1295, limited to 8 weeks.

For convenience (no injections): MK-677 25 mg daily before bed.

For FDA-approved and clinician-supervised: Tesamorelin or Sermorelin through a prescribing physician.

All GH peptides work best with adequate sleep, regular exercise, and proper nutrition. They amplify your body's own GH production — they cannot compensate for poor health habits.

Related Peptides

Ipamorelin

Considered the safest and most beginner-friendly growth hormone peptide. It stimulates your body to release more growth hormone without the unwanted side effects (hunger spikes, stress hormone increases) that come with older GH peptides. This clean profile makes it the most commonly prescribed GH peptide in anti-aging clinics. Usually the recommended starting point for anyone new to peptide therapy, and often combined with CJC-1295 for stronger results.

CJC-1295 (no DAC)

One of the most popular growth hormone peptides, often called Mod GRF 1-29. Instead of injecting growth hormone directly, this tells your pituitary gland to release more of its own GH naturally. This is considered healthier than injecting GH directly because your body keeps its normal feedback systems intact. Usually combined with Ipamorelin for much stronger effects — the two work together better than either alone.

Sermorelin

One of the safest and most studied growth hormone peptides, with the longest track record in clinical use. It was actually FDA-approved (as Geref) for children with growth hormone deficiency before being discontinued for business reasons, not safety concerns. Like CJC-1295, it tells your pituitary to release its own growth hormone naturally. Popular in anti-aging medicine as a gentle, well-understood option.

MK-677

The only growth hormone booster you can take as a pill instead of injecting. Also known as Ibutamoren, it mimics the hunger hormone ghrelin to trigger GH release. Very popular because of the convenience — just swallow a capsule once daily. The major downside is a significant increase in appetite (you will feel hungry), and it stays active for 24 hours so the effects don't switch off. Studied for muscle wasting and bone density but never completed FDA approval.

Tesamorelin

The only growth hormone peptide with active FDA approval — sold as Egrifta for reducing dangerous belly fat (visceral fat) in HIV patients. It's especially effective at targeting the deep fat around your organs, which is the most harmful type. Widely used off-label by people wanting to improve body composition, reduce belly fat, and address fatty liver. In trials it reduced trunk fat by 15-18%.

Hexarelin

The most powerful growth hormone releasing peptide available — it triggers the biggest GH spike of any GHRP. Also uniquely protective for the heart, which has made it interesting for cardiac research. The downside is that its potency comes with more side effects than gentler options like Ipamorelin: it raises cortisol (stress hormone) and prolactin more than any other GHRP, and your body builds tolerance within 2-4 weeks, requiring cycling.

GHRP-2

The second most powerful growth hormone peptide after Hexarelin, but with a better balance of effectiveness vs side effects. It boosts GH strongly while only moderately raising cortisol and prolactin — a good middle ground. Extensively studied in Japanese clinical trials, making it one of the best-understood GH peptides. Also shows stomach-protective properties in animal studies. Often combined with CJC-1295 for stronger results.

GHRP-6

One of the oldest growth hormone peptides, developed in the 1980s. Known for strong GH release but also extreme hunger — it makes you ravenous within 20-30 minutes of injection. This makes it bad for fat loss but potentially useful for people who need to gain weight or struggle with appetite. Research on this peptide actually led to the discovery of ghrelin (the hunger hormone) itself. Also shows protective effects on the heart, liver, and stomach lining.