Vendor comparison · 2026
GHRP-6 vendors: 6 compared on COAs and price
Tissue & recoveryAlso known as Growth hormone releasing peptide 6
Evidence tier
Substantial published literature
971 publications over 42 years · trials not yet curated
- Vendors carrying it
- 6
- 6 with a listed price
- Vendors with checkable COAs
- 1
- 1 publish any certificate
- Lots tested
- 1
- 1 naming a checkable lab
- Independent assays
- 0
- none on file yet
- Newest assay
- 21 Mar 2026
- oldest 21 Mar 2026
- Laboratories named
- 1
- most often Freedom Diagnostics Testing
- Median label gap
- 2.7%
- 100% of lots within 5% of label
- Median purity
- 99.80%
- 1 of 1 lots at 99% or above
- Lowest price per mg
- $3.90
- peer median $4.60
- Publications located
- 971
- researched since 1984
Source: PepIndex, an independent index of research-peptide vendors. No vendor can pay for a rank, every score is computed by a published formula, and every figure links to the document it was read from.
Simple Peptide has the most checkable GHRP-6 testing in this index: 1 lot assayed by Freedom Diagnostics Testing, the newest on 21 Mar 2026. The lowest listed price is $3.90 per mg at Simple Peptide, the same vendor, against a peer median of $4.60. 6 vendors carrying GHRP-6 are compared below. 1 publish at least one certificate naming a checkable laboratory, 1 lot record is on file, and none is an independently commissioned assay. Figures are PepIndex's own: it is an independent index of research-peptide vendors, no vendor can pay for a rank, and each figure links to the certificate it was read from.
Every vendor carrying GHRP-6
| # | Vendor | Score here | Price / mg | Lots | Newest test | Laboratory | Mean purity | Label gap | Reports |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Origin LabsISO/IEC 17025 | 88.2100% | $5.00 (109%) | 0 | — | — | — | — | |
| 2 | Simple Peptide | 82.192% | $3.90 (85%) | 1 / 1 | Freedom Diagnostics Testing | 99.8% | 2.7% | ||
| 3 | Evo Labs Research | 68.487% | $5.50 (120%) | 0 | — | — | — | — | no reportVisit site |
| 4 | GenX Peptides | 68.469% | $4.00 (87%) | 0 | — | — | — | — | no reportVisit site |
| 5 | Bench Grade Peptides | 67.789% | $12.20 (250%) | 0 | — | — | — | — | no reportVisit site |
| 6 | Biotech Peptides | 63.860% | $4.20 (91%) | 0 | — | — | — | — | no reportVisit site |
Independent assays
No independently commissioned assay of GHRP-6 is on file. All 1 records below were published by the vendor that sells the product, naming the laboratory shown. PepIndex does not yet commission its own assays, so nothing on this page establishes what is in a vial beyond the vendor’s own certificate. A record moves into this section the moment an assay commissioned by anyone other than the seller is indexed.
What the certificates show
1 of 1 lots at 99% or above; median 99.80%.
| Range | lots |
|---|---|
| <95% | 0 |
| 95–97% | 0 |
| 97–98% | 0 |
| 98–99% | 0 |
| 99–99.5% | 0 |
| ≥99.5% | 1 |
100% of lots within 5% of the labelled mass; median gap 2.7%.
| Range | lots |
|---|---|
| ≤2% | 0 |
| 2–5% | 1 |
| 5–10% | 0 |
| 10–20% | 0 |
| >20% | 0 |
6 vendors, $3.90 to $12.20; median $4.60.
| Range | vendors |
|---|---|
| $2.00–$4.00 | 1 |
| $4.00–$6.00 | 4 |
| $6.00–$8.00 | 0 |
| $8.00–$10.00 | 0 |
| $10.00–$12.00 | 0 |
| $12.00–$14.00 | 1 |
Purity and mass are read from each certificate as published; the label gap is |labeled − assayed| ÷ labeled. Every value behind these bars is in the certificate table below.
Laboratories used
| Laboratory | Lots | Vendors | Share | Verify |
|---|---|---|---|---|
| Freedom Diagnostics TestingUS | 1 | 1 | 100% | Public lookup |
Every certificate record
| Vendor | Lot | Tested | Lab | Labeled | Assayed | Discrepancy | Purity | Report |
|---|---|---|---|---|---|---|---|---|
 Simple Peptide | GHRP6-10-032026-1 | Freedom Diagnostics Testing | 10 mg | 10.27 mg | 2.7% | 99.8% | Vendor-published |
Score breakdown
The score has two halves: the research base — how long the compound has been studied and how much has been published — and the quality of the evidence the market produces for it, aggregated across every vendor that carries it: assayed purity, lot-to-lot consistency, readable third-party certificates and those vendors’ review record. It measures the evidence base, not the merits or safety of the substance.
Studied since 1984 — 42 years of published research
How long the compound has been studied. Fifteen years or more of published literature earns full marks; a newer compound earns less.
971 publications indexed in PubMed
The volume of published literature located. Full marks at fifty or more publications.
Mean assayed purity 99.8% across 1 certificate
Average assayed purity on the certificates published by vendors that carry this compound. Full marks at 99.5%+, nothing at 95% or below.
single lot on record, mean label deviation 2.7%
How tightly assayed purity and labeled-versus-actual mass hold across different lots. Rewards reproducible manufacturing.
6 of 6 listing vendors publish an accessible certificate policy
Whether the vendors carrying this compound publish per-lot certificates anyone can read without an account.
1 of 1 certificate from a recognised independent lab
Share of certificates issued by a recognised third-party testing lab rather than an unnamed or self-named one.
What is GHRP-6?
A growth-hormone-releasing hexapeptide and ghrelin-receptor agonist studied for stimulating growth hormone secretion.
Studied in published research for growth-hormone release and recovery.
Regulatory status
Labeled by vendors for laboratory research use only. Not approved as a medicine in the United States, United Kingdom, or European Union.
What the research examines
The areas of published research this compound appears in. These describe what the literature has studied — never a claim of benefit, effect or suitability for any use.
Published research
Studied in animal models and human growth-hormone research. PepIndex does not evaluate clinical significance and does not describe administration.
- Growth hormone-releasing peptide 6 (GHRP-6) hydrogel for acute kidney injury therapy via metabolic regulation — Journal of nanobiotechnology (2025)
Peer-reviewed article indexed in PubMed, published in Journal of nanobiotechnology (2025).
- Growth hormone releasing peptide-6 (GHRP-6) prevents doxorubicin-induced myocardial and extra-myocardial damages by activating prosurvival mechanisms — Frontiers in pharmacology (2024)
Peer-reviewed article indexed in PubMed, published in Frontiers in pharmacology (2024).
- Growth hormone releasing hexapeptide-6 (GHRP-6) test in the diagnosis of GH-deficiency — Journal of pediatric endocrinology & metabolism : JPEM (1996)
Peer-reviewed article indexed in PubMed, published in Journal of pediatric endocrinology & metabolism : JPEM (1996).
- Use of growth-hormone-releasing peptide-6 (GHRP-6) for the prevention of multiple organ failure — Clinical science (London, England : 1979) (2006)
Peer-reviewed article indexed in PubMed, published in Clinical science (London, England : 1979) (2006).
- Growth hormone-releasing peptide (GHRP) — Cellular and molecular life sciences : CMLS (1998)
Peer-reviewed article indexed in PubMed, published in Cellular and molecular life sciences : CMLS (1998).
- Growth hormone responses to GH-releasing peptide (GHRP-6) in hypothyroidism — Clinical endocrinology (1997)
Peer-reviewed article indexed in PubMed, published in Clinical endocrinology (1997).
- N-aminoimidazolidin-2-one peptidomimetics — Organic letters (2014)
Peer-reviewed article indexed in PubMed, published in Organic letters (2014).
- On a peptidomimetic growth hormone-releasing peptide — The Journal of clinical endocrinology and metabolism (1994)
Peer-reviewed article indexed in PubMed, published in The Journal of clinical endocrinology and metabolism (1994).
PepIndex describes what literature exists. We do not interpret it, assess clinical significance, or publish quantities, protocols or instructions for use.