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

Test my supply
76%
Finnrick rating
#245 of 378 Retatrutide vendors
2 of 3 classifiable tests passed
natural 67% · customers 4.7★ (3)
methodology · Purity focus
methodology →
Peptides
#
Peptide
$/MG
Rating
N
1
Tirzepatide
$0.70
76%
3
2
Retatrutideselected
$0.74
76%
3
3
Tesamorelin
$2.95
-
0
Contact channels
Rating trend
CUMULATIVE FINNRICK RATING
83%+65%+48%+30%+<30%25 Nov 2025: 75%28 Aug 2026: 75%9 Sep 2026: 76%29 Sep 2026: current 76%75%76%Nov 25Sep 26
Showing Retatrutide tests only
Core Peptides Retatrutide test history
COA-backed lab tests

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 6 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 (3 tests), Tirzepatide (3 tests) 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 6 recent tests.

Corrections
No corrections.
Free peptide testing

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

Test my supply