NEW SITE — FASTER TURNAROUND, MORE LABS. READ ON
Free peptide testing

Ordered Semaglutide from Peptide-S? Mail in a sample (US only) and let us test it for free.

Test my supply
+8 more ↓
71%
Finnrick rating
#25 of 71 Semaglutide vendors
4 of 5 classifiable tests passed
natural 80% · customers 4.5★ (1)
methodology · Purity focus
Finnrick analysis · Semaglutide

Peptide-S Semaglutide is held back mainly by a 98.8% purity miss between otherwise passing identity, purity, and quantity results. The later 99.8% test steadies the trend, while +6% to +20% overfills and sparse feedback add caveats.

methodology →
vendor intelligence report
Vendor Intelligence Report: Peptide-S

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

25 pages6 risk factors assessed12 Jun 2026
read the report
Peptides
#
Peptide
$/MG
Rating
N
1
GHK-Cu
$0.05
90%
9
2
Tirzepatide
$0.39
85%
41
3
Semaglutideselected
$0.72
71%
6
5
Retatrutide
$1.00
68%
45
6
Mazdutide
$1.80
65%
4
7
Survodutide
$3.30
60%
4
8
BPC-157
-
51%
5
10
Tesamorelin
$1.98
42%
8
11
Sermorelin
-
37%
3
12
KPV
-
-
0
14
PT-141
-
-
0
15
SS-31
-
-
0
Contact channels
Rating trend
CUMULATIVE FINNRICK RATING
83%+65%+48%+30%+<30%16 Jul 2025: 69%16 Jul 2025: 72%24 Jul 2025: 67%24 Jul 2025: 69%15 Jan 2026: 71%29 Sep 2026: current 71%69%71%71%Jul 25Sep 26
Showing Semaglutide tests only
Peptide-S Semaglutide test history
COA-backed lab tests

About Peptide-S test results from Finnrick

Peptide-S is a peptide vendor tracked in Finnrick's independent testing dataset. This page compiles batch-level results across 11 peptides and 133 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 Peptide-S peptides in this dataset are BPC-157 (5 tests), Cagrilintide (4 tests) and GHK-Cu (9 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 133 recent tests. It also includes 2 corrections related to this vendor.

Corrections
2025-08-01
Concerning results
Peptide-S Mazdutide results are being reviewed, will be updated soon.
2025-08-01
Concerning results
Peptide-S Survodutide results are being reviewed, will be updated soon.
Free peptide testing

Ordered Semaglutide from Peptide-S? Mail in a sample (US only) and let us test it for free.

Test my supply