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Ordered Retatrutide from Oupeptide? Mail in a sample (US only) and let us test it for free.

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+3 more ↓
74%
Finnrick rating
#288 of 378 Retatrutide vendors
48 of 65 classifiable tests passed
customers 4.4★ (25)
methodology · Purity focus
Finnrick analysis · Retatrutide

Oupeptide Retatrutide is held down by repeated purity misses and large fill outliers, not sparse evidence. Focus on the identity fail at 0 mg, +228% and +53% overfills, and the recent rebound after an Apr 2026 99.4% purity miss.

methodology →
vendor intelligence report
Vendor Intelligence Report: Oupeptide

Corporate records point to a Guangzhou body-care/collagen business while the storefront presents a US/NY location string. The investigation maps cloned sister domains, shared WhatsApp agents, special-line shipping, and COA chain-of-custody gaps.

27 pages6 risk factors assessed3 Jul 2026
read the report
Peptides
#
Peptide
$/MG
Rating
N
1
GHK-Cu
$0.06
83%
16
2
Tirzepatide
$0.44
80%
61
3
Retatrutideselected
$0.70
74%
65
6
PT-141
$0.60
60%
4
8
BPC-157
$0.80
45%
10
9
Tesamorelin
$1.48
38%
14
10
TB-500
-
33%
5
11
CJC-1295
-
30%
3
Contact channels
Rating trend
CUMULATIVE FINNRICK RATING
83%+65%+48%+30%+<30%9 Jun 2025: 57%3 Jul 2025: 60%4 Aug 2025: 63%6 Aug 2025: 65%11 Aug 2025: 69%12 Aug 2025: 65%14 Aug 2025: 67%21 Aug 2025: 70%21 Aug 2025: 72%28 Aug 2025: 68%4 Sep 2025: 71%10 Sep 2025: 73%18 Sep 2025: 75%18 Sep 2025: 76%18 Sep 2025: 77%30 Sep 2025: 78%9 Oct 2025: 80%13 Oct 2025: 81%13 Oct 2025: 78%13 Oct 2025: 79%13 Oct 2025: 76%29 Oct 2025: 77%4 Nov 2025: 78%5 Nov 2025: 78%6 Nov 2025: 79%14 Nov 2025: 77%17 Nov 2025: 77%17 Nov 2025: 78%17 Nov 2025: 79%2 Dec 2025: 76%13 Dec 2025: 77%29 Dec 2025: 75%29 Dec 2025: 76%1 Jan 2026: 74%7 Jan 2026: 72%7 Jan 2026: 72%7 Jan 2026: 73%7 Jan 2026: 74%15 Jan 2026: 74%26 Jan 2026: 75%26 Jan 2026: 76%26 Jan 2026: 76%9 Feb 2026: 74%11 Feb 2026: 75%11 Feb 2026: 76%15 Feb 2026: 76%15 Feb 2026: 77%16 Feb 2026: 77%16 Feb 2026: 78%16 Feb 2026: 76%20 Feb 2026: 77%26 Feb 2026: 75%4 Mar 2026: 76%6 Mar 2026: 76%10 Mar 2026: 77%28 Apr 2026: 77%28 Apr 2026: 77%30 Apr 2026: 76%20 May 2026: 77%22 Jun 2026: 77%26 Jun 2026: 77%1 Jul 2026: 76%13 Jul 2026: 76%20 Jul 2026: 75%6 Aug 2026: 74%29 Sep 2026: current 74%57%79%74%Jun 25Sep 26
Showing Retatrutide tests only
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Ordered Retatrutide from Oupeptide? Mail in a sample (US only) and let us test it for free.

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Oupeptide Retatrutide test history
COA-backed lab tests
1-10 of 65

About Oupeptide test results from Finnrick

Oupeptide is a peptide vendor tracked in Finnrick's independent testing dataset. This page compiles batch-level results across 11 peptides and 195 tests, including ratings, observed price signals, recent test dates, and correction history where available.

Finnrick ratings are calculated from published sample data using the selected rating standard. The default standard evaluates purity, dose accuracy, and label quality, then adjusts low-volume results so small sample counts do not appear more certain than the data supports.

The most visible Oupeptide peptides in this dataset are BPC-157 (10 tests), Cagrilintide (4 tests) and CJC-1295 (3 tests). Use the peptide table above to compare the current Finnrick rating, price per mg, and sample volume for each peptide.

Recent tests and corrections are shown below when available. Samples may be acquired by Finnrick directly or submitted through Finnrick testing programs; the goal is to make safety and supply-chain evidence easier to evaluate than vendor marketing claims alone. This page currently lists 195 recent tests. It also includes 4 corrections related to this vendor.

Corrections
2026-08-07
Lab correction
The previous Certificate of Analysis (COA) contained an error, incorrectly stating that the sample had a potency of **20 mg**. The actual potency of the sample is **30 mg**. A new COA has been issued and reflects the correct potency of **30 mg**.
2026-05-06
Finnrick data entry
Data for sample 4z9e34c and 86nyk43 were swapped following a clerical error by Finnrick. On 6 May, the error was corrected.
2026-05-06
Finnrick data entry
Data for sample hv46bd2 and f7qjrbk were swapped following a clerical error by Finnrick. On 6 May, the error was corrected.
2025-12-26
Customer update
Submitter indicated having swapped vendor identification with sample u4q3pap. This should be OUPeptide instead of Quenna PMQ. Evidence under review, ratings might be updated.
Free peptide testing

Ordered Retatrutide from Oupeptide? Mail in a sample (US only) and let us test it for free.

Test my supply