Compare peptides
Compare two to four peptides side by side. Counts are exact.
In PepBank now:147 peptides, 6 blends and 13 other compounds97,577 study results from 17,383 studies8,473 clinical trialsUpdated
Comparing 2 peptides · Data version 308560
Swipe sideways to see every peptide.
| Peptide | Synthetic analog GHRP-2 | Synthetic analog GHRP-6 | |
|---|---|---|---|
| Identity | |||
| Kind | Synthetic analog | Synthetic analog | |
| Area | Growth hormone axis | Growth hormone axis | |
| Evidence | |||
| Amount of evidence | 632 | 942 | |
| Evidence level | Has results from studies in people | Has results from studies in people | |
| Safety | |||
| Safety results | 19 (8 in people) | 32 (11 in people) | |
| Status | |||
| Approval | |||
| Sport (WADA) | |||
| Registered trials | None registered | None registered | |
Shared outcomes
From the regulatory data of each peptide.
Outcome groups with study results for at least two of these peptides. Counts include only results from studies that gave the peptide. Bar length is the number of results, on one scale. The bars show how much was studied, not how large an effect was. A peptide with more studies can look stronger here without being stronger. For results, see the randomized results above.
| Outcome group | GHRP-2 | GHRP-6 |
|---|---|---|
| Growth hormone and IGF-1Musculoskeletal | 30817310431 | 377 |
PepBank is a research reference. Talk to a doctor before you use any peptide.
Its most advanced trial is in phase 3. The FDA, the EMA and the other sources we use show no approval (as of 9 Oct 2026).
| Receptor activity and mechanismRespiratory | 6411152 | 190167122 |
|---|
| Stress hormonesEndocrine and hormones | 30291 | 33258 |
|---|
| Pituitary hormonesEndocrine and hormones | 21165 | 16943 |
|---|
| PharmacokineticsPharmacology | 16952 | 221372 |
|---|
| Appetite and food intakeMetabolic and weight | 321022 | 2727 |
|---|
| Adverse eventsWhole body | 15672 | 20614 |
|---|
| Inflammation markersRespiratory | 3511717 | 66 |
|---|
| Sex hormones and fertilityEndocrine and hormones | 44 | 15411 |
|---|
| Thyroid functionEndocrine and hormones | 972 | 431 |
|---|
| Body weightMetabolic and weight | 18216 | 1616 |
|---|
| Heart functionCardiovascular | 1459 | 2222 |
|---|
Each analog against its native parent, residue by residue. Substitutions, non-standard residues and modifications are marked. Calculated from the two sequences.
GHRP-2 differs from Ghrelin (human), ghrelin-28 at 5 positions and carries 1 added group.
What is different
GHRP-6 differs from Ghrelin (human), ghrelin-28 at 5 positions.
What is different
Registered trials, ranked by phase (late phases first), then posted results and enrollment. Status is the registry status. Study results come from published studies. Results posted at ClinicalTrials.gov are shown on each trial page.
For each outcome that two or more peptides have results for: the best result of a single randomized trial, on the same measure (the same kind of number, the same unit). When a trial has several dose arms, the cell shows the highest dose arm. The trials differ in people, length and dose, so a gap between two cells is not proof that one peptide works better.
No outcome has a randomized-trial result on the same measure for two or more of these peptides yet.
The other peptides have no randomized result on the same measure, so these results cannot be set side by side.
| Outcome | GHRP-2 | GHRP-6 |
|---|---|---|
| Stress hormonesEndocrine and hormonesCompared as: value in the arm that got the peptide, in nmol/l | 616 nmol/l Stimulated peak cortisol · GHRP-2 Saline, somatostatin or GHRH (grand mean): 420 nmol/l n = 422010 | No comparable result 2 randomized-trial results measure it in another way or another unit. |
| Growth hormone and IGF-1Endocrine and hormonesCompared as: difference from placebo, in fold | 7 fold fold change in GH mass per burst Dose studied: 1 microg/kg x h24 hn = 102000 | No comparable result 15 randomized-trial results measure it in another way or another unit. |
| LipidsMetabolic and weightCompared as: value in the arm that got the peptide, in % | 60% Plasma FFA rise · after GHRP-2 n = 92000 | No randomized trial result 9 results from other study designs. |
| Hormone levelsEndocrine and hormonesCompared as: value in the arm that got the peptide, in % | 35% Cortisol increase · GHRP-2 Dose studied: 1 microgram/kgn not reported1996 | No randomized trial result 5 results from other study designs. |
| Pituitary hormonesEndocrine and hormonesCompared as: difference from placebo, in % | 21% Mean PRL increase Dose studied: 1 microgram/kg bolus, then 1 microgram/kg/h21 hoursn not reported1997 |
No randomized trial result
16 results from other study designs.
7 fold
fold change in GH mass per burst
Dose studied: 1 microg/kg x h24 hn = 102000
No comparable result
15 randomized-trial results measure it in another way or another unit.