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Ordered peptides from Core Peptides? Mail in a sample (US only) and let us test it.

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75%
Finnrick rating
#146 of 345 ranked vendors
1 of 3 classifiable tests passed
methodology · Purity focus
methodology →
Peptides
#
Peptide
$/MG
Rating
N
1
Retatrutide
$0.74
76%
2
2
Tirzepatide
$0.49
75%
1
3
Tesamorelin
$2.95
-
0
Contact channels
Rating trend
CUMULATIVE FINNRICK RATING
83%+65%+48%+30%+<30%28 Aug 2026: 75%4 Sept 2026: 75%9 Sept 2026: 75%23 Sept 2026: current 75%75%75%75%Aug 26Sep 26
Core Peptides test history
COA-backed lab tests
DateResultTestLabPurityDosageLabelCOA
9 Sep 2026
Pass
Retatrutide
lab nameView COA
4 Sep 2026
Fail
Tirzepatide
lab nameView COA
28 Aug 2026
Fail
Retatrutide
lab nameView COA

About Core Peptides test results from Finnrick

Core Peptides is a peptide vendor tracked in Finnrick's independent testing dataset. This page compiles batch-level results across 2 peptides and 3 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 Core Peptides peptides in this dataset are Retatrutide (2 tests), Tirzepatide (1 test) and Tesamorelin (0 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 3 recent tests.

Corrections
No corrections.
Free peptide testing

Ordered peptides from Core Peptides? Mail in a sample (US only) and let us test it.

Test my supply