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

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+8 more ↓
85%
Finnrick rating
#18 of 262 Tirzepatide vendors
34 of 40 classifiable tests passed
customers 4.7★ (12)
methodology · Purity focus
Finnrick analysis · Tirzepatide

Earlier purity and fill misses hold back Peptide-S Tirzepatide, including 98.403% and 98.94% purity results plus +56%/+36% overfills. Recent tests form a cleaner streak; batch IDs remain mixed.

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
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Peptides
#
Peptide
$/MG
Rating
N
1
GHK-Cu
$0.05
90%
9
2
Tirzepatideselected
$0.39
85%
41
3
Semaglutide
$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%9 Jun 2025: 58%11 Jun 2025: 58%11 Jun 2025: 60%20 Jun 2025: 64%29 Jun 2025: 59%8 Jul 2025: 54%16 Jul 2025: 56%16 Jul 2025: 58%16 Jul 2025: 60%17 Jul 2025: 63%25 Jul 2025: 66%25 Jul 2025: 68%25 Jul 2025: 69%25 Jul 2025: 70%25 Jul 2025: 72%25 Jul 2025: 73%3 Aug 2025: 74%12 Aug 2025: 72%12 Aug 2025: 73%21 Aug 2025: 74%21 Aug 2025: 75%31 Aug 2025: 76%4 Sep 2025: 77%4 Sep 2025: 78%4 Sep 2025: 79%4 Sep 2025: 80%4 Sep 2025: 80%18 Sep 2025: 81%3 Oct 2025: 79%24 Oct 2025: 80%13 Dec 2025: 80%18 Dec 2025: 81%15 Jan 2026: 82%11 Feb 2026: 82%13 Feb 2026: 83%26 Feb 2026: 83%2 Mar 2026: 84%2 Mar 2026: 84%4 Mar 2026: 85%9 Aug 2026: 85%29 Sep 2026: current 85%58%80%85%Jun 25Sep 26
Showing Tirzepatide tests only
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Ordered Tirzepatide from Peptide-S? Mail in a sample (US only) and let us test it for free.

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Peptide-S Tirzepatide test history
COA-backed lab tests
1-10 of 41

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

Test my supply