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Peptide testing

Ordered Semaglutide from Nantong Guangyuan Chemical GYC? Mail in a sample (US only) and let us test it.

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62%
Finnrick rating
#59 of 77 Semaglutide vendors
1 of 3 classifiable tests passed
natural 33%
methodology · Purity focus
Finnrick analysis · Semaglutide

Nantong Guangyuan Chemical GYC's strongest purity-focus evidence is in Retatrutide and Tirzepatide, where recent results are mostly high after isolated purity misses and fill swings. The weaker side is a much thinner Cagrilintide and Semaglutide record, with Semaglutide showing repeated failures and uneven batch documentation adding uncertainty.

methodology →
vendor intelligence report
Vendor Intelligence Report: Nantong Guangyuan Chemical GYC

Corporate and web-infrastructure records separate real GYC anchors from a ggpeps.net clone that routes buying intent to Oath Research. The report maps the review-site cluster, borrowed award claims, official COA checks, and unresolved GYC ownership trail.

30 pages6 risk factors assessed12 Nov 2026
read the report
Peptides
#
Peptide
$/MG
Rating
N
1
Retatrutide
$0.82
90%
22
2
Tirzepatide
$0.35
88%
25
3
Semaglutideselected
-
62%
3
4
Cagrilintide
$7.20
59%
4
Contact channels
Rating trend
CUMULATIVE FINNRICK RATING
83%+65%+48%+30%+<30%30 Oct 2025: 63%23 Nov 2025: 65%5 Dec 2025: 60%12 Nov 2026: current 62%63%62%Oct 25Nov 26
Showing Semaglutide tests only
Nantong Guangyuan Chemical GYC Semaglutide test history
COA-backed lab tests

About Nantong Guangyuan Chemical GYC test results from Finnrick

Nantong Guangyuan Chemical GYC is a peptide vendor tracked in Finnrick's independent testing dataset. This page compiles batch-level results across 4 peptides and 54 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 Nantong Guangyuan Chemical GYC peptides in this dataset are Retatrutide (22 tests) and Tirzepatide (25 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 54 recent tests.

Corrections
No corrections.
Peptide testing

Ordered Semaglutide from Nantong Guangyuan Chemical GYC? Mail in a sample (US only) and let us test it.

Test my supply