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

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73%
Finnrick rating
#249 of 457 ranked vendors
1 of 3 classifiable tests passed
methodology · Purity focus
methodology →
Peptides
#
Peptide
$/MG
Rating
N
1
Retatrutide
$1.36
73%
3
Contact channels
Rating trend
CUMULATIVE FINNRICK RATING
83%+65%+48%+30%+<30%17 Nov 2025: 71%20 Feb 2026: 75%3 Mar 2026: 71%5 Oct 2026: current 73%71%73%Nov 25Oct 26
Sigma Peptides test history
COA-backed lab tests
DateResultTestLabPurityDosageLabelCOA
3 Mar 2026
Fail
Retatrutide
lab nameView COA
20 Feb 2026
Pass
Retatrutide
lab nameView COA
17 Nov 2025
Fail
Retatrutide
lab nameView COA

About Sigma Peptides test results from Finnrick

Sigma Peptides is a peptide vendor tracked in Finnrick's independent testing dataset. This page compiles batch-level results across 1 peptide 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 Sigma Peptides peptides in this dataset are Retatrutide (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 3 recent tests.

Corrections
No corrections.
Free peptide testing

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

Test my supply