GrayPep reviews
GrayPep reviews: 7 independent lab tests across 2 products, with a limited lab record.
Written by the Peptide Vendor Reviews editorial team
Is GrayPep legit? Lab record: Limited
How we rate- 7 independent tests
- 4 of 7 lots filled to label
- Median purity 99.9%
- Both products graded C or better
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Vendor website
Visit GrayPep
7 independent COAs · not paid-to-rank · 3 of 7 lots under label
Visit GrayPepOpens the vendor site. No partner discount on this shop.
Peptide Vendor Reviews independently tests products and verifies reviews. Public methodology, no pay-to-rank.
GrayPep products we've tested
Best-graded first. Grades come from the share of each product's samples that passed purity and quantity checks. Buy links open GrayPep's site.
- TirzepatideAGREAT
- Tests
- 4
- Passed
- 100.0%
- GHK-CuAGREAT
- Tests
- 3
- Passed
- 100.0%
What the testing shows
Across 7 measured samples from GrayPep, 3 came in more than 5% under the quantity on the label (43%). Another 2 measured more than 5% over. Purity across 7 readings ran from 99.8% to 99.9%, median 99.9%. Samples span Mar 2026 to May 2026.
- Under label
- 3/7
- Median purity
- 99.9%
- Latest sample
- May 2026
more than 5% short
99.8%–99.9% range
first tested Mar 2026
Our read on GrayPep
7 of GrayPep's 7 graded samples passed (100%), and 100% of all samples were sent in by buyers rather than by the shop.
Against the 302 shops with at least five graded tests, GrayPep's pass rate is at or above 100% of them, and it has more tests on record than 17% of them.
When and how GrayPep was tested
Samples per month. The darker part of each bar failed.
- Labs used
- Krause Analytical (6), BTLabs (1)
- Who sent the samples
- buyers 100%
- Batches covered
- 2 distinct batch numbers; 2 checked for endotoxins
Lab testing results
Independent results across 2 products.
Individual lab tests
Date
5/13/2026
Purity
99.9%
Quantity
100 mg → 105 mg
Lab
Krause Analytical
Vial
No Label / Silver Crimp / Violet Cap
Date
5/11/2026
Purity
99.9%
Quantity
60 mg → 60.6 mg
Lab
Krause Analytical
Vial
No Label / Copper Crimp / Clear Cap
Date
3/20/2026
Purity
99.8%
Quantity
30 mg → 27.6 mg
Lab
BTLabs
Vial
No Label / Silver Crimp / Black Cap
Date
3/10/2026
Purity
99.9%
Quantity
50 mg → 53.1 mg
Lab
Krause Analytical
Vial
No Label / Silver Crimp / Clear Blue Cap
Date
3/10/2026
Purity
99.9%
Quantity
50 mg → 55.2 mg
Lab
Krause Analytical
Vial
No Label / Silver Crimp / Clear Blue Cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| GHK-CuNo Label / Silver Crimp / Violet Cap | 5/13/2026 | 10.0 | 99.9% | 100 mg → 105 mg | Krause Analytical | View |
| TirzepatideNo Label / Copper Crimp / Clear Cap | 5/11/2026 | 10.0 | 99.9% | 60 mg → 60.6 mg | Krause Analytical | View |
| TirzepatideNo Label / Silver Crimp / Black Cap | 3/20/2026 | 10.0 | 99.8% | 30 mg → 27.6 mg | BTLabs | View |
| GHK-CuNo Label / Silver Crimp / Clear Blue Cap | 3/10/2026 | 10.0 | 99.9% | 50 mg → 53.1 mg | Krause Analytical | View |
| GHK-CuNo Label / Silver Crimp / Clear Blue Cap | 3/10/2026 | 10.0 | 99.9% | 50 mg → 55.2 mg | Krause Analytical | View |
Which GrayPep products tested best
GHK-Cu and Tirzepatide have the strongest record, graded A or B.
Buying from GrayPep
If you order from GrayPep, start with the graded products in the table: each one links straight to the shop.
We don't track GrayPep's prices yet. Shipping, payment and refund terms are on their site.
The official store is graypep.com. Check the address before you pay.
What to check before you pay
- The lot number on the vial matches the certificate
- The certificate names the lab and the test date
- Fill versus label, not purity alone
- A refund policy in writing
Track GrayPep
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GrayPep: common questions
Is GrayPep legit?
We rate lab records, not businesses. Limited lab record: 7 independent tests, 4 of 7 lots filled to label, median purity 99.9%, both products graded C or better. Each result links to its original certificate in the table above.
What do GrayPep reviews say?
We don't hold scored customer reviews for GrayPep yet. The independent lab results on this page are the evidence we have.
Which GrayPep peptides tested best?
We have graded 2 GrayPep products. GHK-Cu and Tirzepatide graded A or B.
Is there a GrayPep coupon code?
We don't have a verified GrayPep coupon code. A discount changes the price, not what is in the vial.
Ordering from GrayPep?
Limited lab record: 7 independent tests, 4 of 7 lots filled to label, median purity 99.9%, both products graded C or better.