Oupeptide Reviews
Oupeptide review: 195 independent lab tests across 11 products, with a mixed lab record.
Written by the Peptide Vendor Reviews editorial team
Is Oupeptide legit? Lab record: Mixed
How we rate- 195 independent tests
- 133 of 179 lots filled to label
- Median purity 99.8%
- 7 of 11 products graded D or E
Some of Oupeptide's products graded D or E. The shops below tested A or B for the same peptides.
Better-tested Cagrilintide
Oupeptide graded E. Shanghai Baoju's Cagrilintide graded A across 5 tests.
Buy from Shanghai BaojuAll better-tested optionsPeptide Vendor Reviews independently tests products and verifies reviews. Public methodology, no pay-to-rank.
Better-tested options
Where Oupeptide graded D or E, these shops' samples of the same peptide graded A or B. Ordered by grade, then price per mg. Partner status never changes the order.
Oupeptide 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 Oupeptide's site.
- TirzepatideBGOOD
- Tests
- 61
- Passed
- 80.3%
- GHK-CuBGOOD
- Tests
- 16
- Passed
- 81.3%
- RetatrutideCOKAY
- Tests
- 65
- Passed
- 73.8%
- IpamorelinCOKAY
- Tests
- 7
- Passed
- 71.4%
- SemaglutideDPOOR
- Tests
- 6
- Passed
- 66.7%
- TesamorelinEBAD
- Tests
- 14
- Passed
- 28.6%
- BPC-157EBAD
- Tests
- 10
- Passed
- 40.0%
- TB-500EBAD
- Tests
- 5
- Passed
- 20.0%
- CagrilintideEBAD
- Tests
- 4
- Passed
- 50.0%
- PT-141EBAD
- Tests
- 4
- Passed
- 50.0%
- CJC-1295EBAD
- Tests
- 3
- Passed
- 33.3%
What the testing shows
Across 179 measured samples from Oupeptide, 46 came in more than 5% under the quantity on the label (26%). Another 57 measured more than 5% over. Purity across 185 readings ran from 78.31% to 100%, median 99.8%. Samples span Jun 2025 to Sep 2026.
- Under label
- 46/179
- Median purity
- 99.8%
- Latest sample
- Sep 2026
more than 5% short
78.31%–100% range
first tested Jun 2025
Our read on Oupeptide
133 of Oupeptide's 195 graded samples passed (68%), and 98% of all samples were sent in by buyers rather than by the shop.
Results are slipping: 54% passed over the latest six months, down from 70% before.
When a sample failed, the most common reason was purity under 99.5% (44 times).
10 samples failed identity, meaning the lab could not confirm the vial held the labelled peptide.
Against the 302 shops with at least five graded tests, Oupeptide's pass rate is at or above 41% of them, and it has more tests on record than 97% of them.
When and how Oupeptide was tested
Samples per month. The darker part of each bar failed.
- Labs used
- Krause Analytical (130), BTLabs (53), Chromate (6), Freedom Diagnostics (5)
- Who sent the samples
- buyers 98%, testing programme 2%
- Batches covered
- 46 distinct batch numbers; 3 checked for endotoxins
Why Oupeptide's failed samples failed
The 6 most recent failed tests, with the lab's reason.
Retatrutide · Aug 6, 2026
amount in the vial more than 35% off the label
Retatrutide · Jul 20, 2026
the lab could not confirm it was the labelled peptide
GHK-Cu · Jul 20, 2026
amount in the vial more than 35% off the label
TB-500 · Jul 20, 2026
the lab could not confirm it was the labelled peptide
BPC-157 · Jul 20, 2026
the lab could not confirm it was the labelled peptide
PT-141 · Jul 13, 2026
the lab could not confirm it was the labelled peptide
Lab testing results
Independent results across 11 products.
Individual lab tests
Date
9/15/2026
Purity
99.9%
Quantity
50 mg → 42.4 mg
Lab
Krause Analytical
Vial
No label / Silver crimp / White cap
Date
8/6/2026
Purity
99.8%
Quantity
10 mg → 14.9 mg
Lab
BTLabs
Vial
White label, Silver crimp, Clear Blue cap
Date
7/20/2026
Purity
—
Quantity
—
Lab
BTLabs
Vial
No label / Silver crimp / White cap
Date
7/20/2026
Purity
—
Quantity
—
Lab
BTLabs
Vial
No label / Silver crimp / Clear Pink cap
Date
7/20/2026
Purity
99.7%
Quantity
50 mg → 27.4 mg
Lab
BTLabs
Vial
No label / Silver crimp / Blue cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| GHK-CuNo label / Silver crimp / White cap | 9/15/2026 | 10.0 | 99.9% | 50 mg → 42.4 mg | Krause Analytical | View |
| RetatrutideWhite label, Silver crimp, Clear Blue cap | 8/6/2026 | 10.0 | 99.8% | 10 mg → 14.9 mg | BTLabs | View |
| BPC-157No label / Silver crimp / White cap | 7/20/2026 | — | — | BTLabs | View | |
| TB-500No label / Silver crimp / Clear Pink cap | 7/20/2026 | — | — | BTLabs | View | |
| GHK-CuNo label / Silver crimp / Blue cap | 7/20/2026 | 10.0 | 99.7% | 50 mg → 27.4 mg | BTLabs | View |
Which Oupeptide products tested best
GHK-Cu and Tirzepatide have the strongest record, graded A or B.
Retatrutide and Ipamorelin graded C.
Semaglutide, Cagrilintide, PT-141, BPC-157, CJC-1295, Tesamorelin and TB-500 graded D or E: a large share of their samples missed purity or quantity thresholds.
Buying from Oupeptide
If you order from Oupeptide, the A- and B-graded products are the safer picks on this record. For the weaker ones, the better-tested options on this page come from other shops.
We don't track Oupeptide's prices yet. Shipping, payment and refund terms are on their site.
The official store is oupeptide.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 Oupeptide
Create a free account to save this vendor, get alerts for new lab tests, and watch price changes.
Oupeptide: common questions
Is Oupeptide legit?
We rate lab records, not businesses. Mixed lab record: 195 independent tests, 133 of 179 lots filled to label, median purity 99.8%, 7 of 11 products graded D or E. Each result links to its original certificate in the table above.
What do Oupeptide reviews say?
We don't hold scored customer reviews for Oupeptide yet. The independent lab results on this page are the evidence we have.
Which Oupeptide peptides tested best?
We have graded 11 Oupeptide products. GHK-Cu and Tirzepatide graded A or B. Semaglutide, Cagrilintide, PT-141, BPC-157, CJC-1295, Tesamorelin and TB-500 graded D or E.
Is there a Oupeptide coupon code?
We don't have a verified Oupeptide coupon code. A discount changes the price, not what is in the vial.
Ordering from Oupeptide?
Mixed lab record: 195 independent tests, 133 of 179 lots filled to label, median purity 99.8%, 7 of 11 products graded D or E.
Contact
- US, NY 38954
- oupeptide.com