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83%
Finnrick rating
#28 of 301 ranked vendors
43 of 46 classifiable tests passed
methodology · Purity focus
Finnrick analysis

Nantong Guangyuan Chemical GYC shows its strongest Purity focus signal in Retatrutide, where high-purity recent results mostly recovered after one severe underfill. Tirzepatide is more dispersed, with two sub-99.5% purity misses and wide fill swings despite later passes; evidence is current and fairly voluminous, but batch documentation gaps add uncertainty.

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

A clone-site trail uses a near-match Telegram handle, fake verification badge, and backdated review wall to impersonate GYC. The report separates the real Nantong trading entity from fraud infrastructure across domains, DNS, forum posts, and channel history.

20 pages4 risk factors assessed12 Jun 2026
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Peptides
#
Peptide
$/MG
Rating
N
1
Retatrutide
$0.68
89%
19
2
Tirzepatide
$0.35
88%
23
3
Cagrilintide
$7.20
66%
4
Contact channels
Rating trend
CUMULATIVE FINNRICK RATING
83%+65%+48%+30%+<30%23 Oct 2025: 80%24 Oct 2025: 80%24 Oct 2025: 81%29 Oct 2025: 81%30 Oct 2025: 82%30 Oct 2025: 82%3 Nov 2025: 81%4 Nov 2025: 82%4 Nov 2025: 82%14 Nov 2025: 74%22 Nov 2025: 75%23 Nov 2025: 75%23 Nov 2025: 76%23 Nov 2025: 76%25 Nov 2025: 74%2 Dec 2025: 75%7 Jan 2026: 76%7 Jan 2026: 76%9 Jan 2026: 76%15 Jan 2026: 77%15 Jan 2026: 78%26 Jan 2026: 78%26 Jan 2026: 79%26 Jan 2026: 79%26 Jan 2026: 79%26 Jan 2026: 80%26 Jan 2026: 80%26 Jan 2026: 81%4 Feb 2026: 81%10 Feb 2026: 81%11 Feb 2026: 81%16 Feb 2026: 82%26 Feb 2026: 80%1 Mar 2026: 81%3 Mar 2026: 81%3 Mar 2026: 81%18 Mar 2026: 81%25 Mar 2026: 82%13 Jul 2026: 82%17 Jul 2026: 83%10 Aug 2026: current 83%80%80%83%Oct 25Aug 26
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Nantong Guangyuan Chemical GYC test history
COA-backed lab tests
1-10 of 46

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 3 peptides and 46 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 (19 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 46 recent tests.

Corrections
No corrections.
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