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

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+3 more ↓
72%
Finnrick rating
#319 of 378 Retatrutide vendors
7 of 11 classifiable tests passed
natural 64% · customers 4.6★ (10)
methodology · Purity focus
Finnrick analysis · Retatrutide

Zen Peptides Retatrutide is held down by early purity misses at 98.83%, 98.93%, and 99.2%, followed by a later run of compliant identity/purity/fill results. Batch identifiers are mostly absent, so traceability lags the lab rebound.

methodology →
vendor intelligence report
Vendor Intelligence Report: Zen Peptides

We investigated who actually operates Zen Peptides — corporate records, ownership trails, web infrastructure, and how its lab results break down product by product. Read the full report before you order.

26 pages7 risk factors assessed13 Jun 2026
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Peptides
#
Peptide
$/MG
Rating
N
1
GHK-Cu
$0.07
89%
4
2
Tirzepatide
$0.33
79%
5
3
Retatrutideselected
$1.00
72%
11
5
BPC-157
$0.88
51%
3
6
Tesamorelin
$2.50
44%
6
7
NAD+
$0.02
33%
3
8
HGH
-
-
0
9
MOTS-c
$0.88
-
0
10
Semax
$1.19
-
0
11
TB-500
$2.00
-
0
Contact channels
Rating trend
CUMULATIVE FINNRICK RATING
83%+65%+48%+30%+<30%23 Oct 2025: 70%17 Nov 2025: 72%17 Nov 2025: 68%10 Dec 2025: 64%1 Jan 2026: 67%7 Jan 2026: 68%10 Feb 2026: 71%3 Mar 2026: 72%3 Mar 2026: 73%20 Jul 2026: 71%24 Sep 2026: 72%29 Sep 2026: current 72%70%72%72%Oct 25Sep 26
Showing Retatrutide tests only
Zen Peptides Retatrutide test history
COA-backed lab tests
1-10 of 11

About Zen Peptides test results from Finnrick

Zen Peptides is a peptide vendor tracked in Finnrick's independent testing dataset. This page compiles batch-level results across 7 peptides and 35 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 Zen Peptides peptides in this dataset are BPC-157 (3 tests), GHK-Cu (4 tests) and Ipamorelin (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 35 recent tests.

Corrections
No corrections.
Free peptide testing

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

Test my supply