Nantong Guangyuan Chemical GYC reviews
Nantong Guangyuan Chemical GYC reviews: 54 independent lab tests across 4 products, with a mixed lab record.
Written by the Peptide Vendor Reviews editorial team
Is Nantong Guangyuan Chemical GYC legit? Lab record: Mixed
How we rate- 54 independent tests
- 46 of 54 lots filled to label
- Median purity 99.9%
- 1 of 4 products graded D or E
Some of Nantong Guangyuan Chemical GYC's products graded D or E. The shops below tested A or B for the same peptides.
Better-tested Semaglutide
Nantong Guangyuan Chemical GYC graded E. Pura Peptides's Semaglutide graded A across 1 test, $5.00 / mg.
Buy from Pura PeptidesAll better-tested optionsPeptide Vendor Reviews independently tests products and verifies reviews. Public methodology, no pay-to-rank.
Better-tested options
Where Nantong Guangyuan Chemical GYC graded D or E, these shops' samples of the same peptide graded A or B. Ordered by grade, then price per mg. Partner status never changes the order.
Semaglutide
Nantong Guangyuan Chemical GYC: grade ENantong Guangyuan Chemical GYC products we've tested
Best-graded first. Grades come from the share of each product's samples that passed purity and quantity checks. Buy links open Nantong Guangyuan Chemical GYC's site.
- TirzepatideAGREAT
- Tests
- 25
- Passed
- 92.0%
- RetatrutideAGREAT
- Tests
- 22
- Passed
- 95.5%
- CagrilintideCOKAY
- Tests
- 4
- Passed
- 75.0%
- SemaglutideEBAD
- Tests
- 3
- Passed
- 33.3%
What the testing shows
Across 54 measured samples from Nantong Guangyuan Chemical GYC, 8 came in more than 5% under the quantity on the label (15%). Another 26 measured more than 5% over. Purity across 54 readings ran from 98.5% to 100%, median 99.9%. Samples span Oct 2025 to Oct 2026.
- Under label
- 8/54
- Median purity
- 99.9%
- Latest sample
- Oct 2026
more than 5% short
98.5%–100% range
first tested Oct 2025
Our read on Nantong Guangyuan Chemical GYC
48 of Nantong Guangyuan Chemical GYC's 54 graded samples passed (89%), and 100% of all samples were sent in by buyers rather than by the shop.
Results are improving: 100% passed over the latest six months, up from 87% before.
When a sample failed, the most common reason was purity under 99.5% (4 times).
Against the 302 shops with at least five graded tests, Nantong Guangyuan Chemical GYC's pass rate is at or above 86% of them, and it has more tests on record than 81% of them.
When and how Nantong Guangyuan Chemical GYC was tested
Samples per month. The darker part of each bar failed.
- Labs used
- BTLabs (25), Krause Analytical (21), Chromate (3), PharmLabs (2)
- Who sent the samples
- buyers 100%
- Batches covered
- 31 distinct batch numbers; 2 checked for endotoxins
Why Nantong Guangyuan Chemical GYC's failed samples failed
The 6 most recent failed tests, with the lab's reason.
Tirzepatide · Feb 26, 2026
purity under 99.5%
Semaglutide · Dec 5, 2025
purity under 99.5%
Tirzepatide · Nov 25, 2025
purity under 99.5%
Cagrilintide · Nov 22, 2025
amount in the vial more than 35% off the label
Retatrutide · Nov 3, 2025
amount in the vial more than 35% off the label
Semaglutide · Oct 30, 2025
purity under 99.5%
Lab testing results
Independent results across 4 products.
Individual lab tests
Date
10/14/2026
Purity
99.99%
Quantity
50 mg → 54.28 mg
Lab
PharmLabs
Vial
Silver crimp / Green cap
Date
10/14/2026
Purity
99.99%
Quantity
60 mg → 64.46 mg
Lab
PharmLabs
Vial
Teal crimp / Black cap
Date
10/6/2026
Purity
100%
Quantity
15 mg → 19.107 mg
Lab
Ichor Life Sciences
Vial
Silver crimp / Black cap
Date
10/1/2026
Purity
99.9%
Quantity
60 mg → 59.99 mg
Lab
Harrens Lab
Vial
No label / Silver crimp / Black cap
Date
9/30/2026
Purity
99.9%
Quantity
20 mg → 19.99 mg
Lab
Harrens Lab
Vial
No label / Silver crimp / Blue cap
| Product | Date | Score | Purity | Quantity | Lab | COA |
|---|---|---|---|---|---|---|
| RetatrutideSilver crimp / Green cap | 10/14/2026 | 10.0 | 99.99% | 50 mg → 54.28 mg | PharmLabs | View |
| TirzepatideTeal crimp / Black cap | 10/14/2026 | 10.0 | 99.99% | 60 mg → 64.46 mg | PharmLabs | View |
| RetatrutideSilver crimp / Black cap | 10/6/2026 | 10.0 | 100% | 15 mg → 19.107 mg | Ichor Life Sciences | View |
| TirzepatideNo label / Silver crimp / Black cap | 10/1/2026 | 10.0 | 99.9% | 60 mg → 59.99 mg | Harrens Lab | View |
| RetatrutideNo label / Silver crimp / Blue cap | 9/30/2026 | 10.0 | 99.9% | 20 mg → 19.99 mg | Harrens Lab | View |
Which Nantong Guangyuan Chemical GYC products tested best
Retatrutide and Tirzepatide have the strongest record, graded A or B.
Cagrilintide graded C.
Semaglutide graded D or E: a large share of its samples missed purity or quantity thresholds.
Buying from Nantong Guangyuan Chemical GYC
If you order from Nantong Guangyuan Chemical GYC, the A- and B-graded products are the safer picks on this record. For the weaker ones, the better-tested options on this page come from other shops.
We don't track Nantong Guangyuan Chemical GYC's prices yet. Shipping, payment and refund terms are on their site.
The official store is discord.gg/38vBSt3r6p. Check the address before you pay.
What to check before you pay
- The lot number on the vial matches the certificate
- The certificate names the lab and the test date
- Fill versus label, not purity alone
- A refund policy in writing
Track Nantong Guangyuan Chemical GYC
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Nantong Guangyuan Chemical GYC: common questions
Is Nantong Guangyuan Chemical GYC legit?
We rate lab records, not businesses. Mixed lab record: 54 independent tests, 46 of 54 lots filled to label, median purity 99.9%, 1 of 4 products graded D or E. Each result links to its original certificate in the table above.
What do Nantong Guangyuan Chemical GYC reviews say?
We don't hold scored customer reviews for Nantong Guangyuan Chemical GYC yet. The independent lab results on this page are the evidence we have.
Which Nantong Guangyuan Chemical GYC peptides tested best?
We have graded 4 Nantong Guangyuan Chemical GYC products. Retatrutide and Tirzepatide graded A or B. Semaglutide graded D or E.
Is there a Nantong Guangyuan Chemical GYC coupon code?
We don't have a verified Nantong Guangyuan Chemical GYC coupon code. A discount changes the price, not what is in the vial.
Ordering from Nantong Guangyuan Chemical GYC?
Mixed lab record: 54 independent tests, 46 of 54 lots filled to label, median purity 99.9%, 1 of 4 products graded D or E.
About Nantong Guangyuan Chemical GYC
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