GYC/GGpeps
GYC Peptides
Also known as GG Peps, GYC, GYC / GG peps, GYC ggpeps, ggpeps
GYC/GGpeps covers 79% of its batches with lab certificates—below the site median of 85%—but community members have organized 70 group tests against its products, well above the median of 20, suggesting customers are doing testing the vendor has not. Four batches have been flagged: one Tirzepatide was identified on blind testing as Retatrutide instead, one Retatrutide showed endotoxin at 57.403 EU/vial (against the 10 EU/vial limit), and one Tirzepatide pair tested at claimed weights but with purities near 99.87%. Five endotoxin tests have failed across the catalog. The vendor has 22 direct problem reports on file, including one unattributed report against its NAD+ line.
Written from the batch and test records on this page. Every certificate counted here was commissioned by the vendor — no independent test has been submitted to the site. Updated 2026-10-19.
Evidence Summary
76
Batches Tracked
61
Batches Tested
99.7%
Avg Purity
95%
Identity Pass Rate
100 certificates seen. 15 of them name no lot we can match a vial to, so they are not counted in the figures above.
Last independent test: 6 days ago
Peptides
Batch History
| Batch | Peptide | Test Status | First Seen | Mentions |
|---|---|---|---|---|
| 2025111310 | Cagrilintide | 99.8% | 2 weeks ago | 0 |
| 2025111060 | Tirzepatide | 99.8% | 2 weeks ago | 0 |
| 2026096380 | KLOW | Untested | 2 weeks ago | 8 |
| 2026091230 | Retatrutide | Untested | 2 weeks ago | 8 |
| 2026072850 | SS-31 | 99.8% | 2 weeks ago | 4 |
| 2026081040 | Tirzepatide | 99.9% | 2 weeks ago | 7 |
| 2026091215 | Retatrutide | 99.8% | 2 weeks ago | 24 |
| 2025121220 | Retatrutide | 99.8% | 3 weeks ago | 0 |
| 2025101220 | Retatrutide | 99.7% | 3 weeks ago | 0 |
| 2025091215 | Retatrutide | 99.5% | 3 weeks ago | 0 |
Community Sentiment
Recent Concerns
Spade: If a 3rd party test comes back failing endo, is that honored for certain facilities? <@1420324903961493535> , it came back high for SS-31 for the 2026072850 run, so we are running test on the
Is this black thing just a piece of rubber lid? Got it form ggpeps
H1tter: <@1420324903961493535> It appears the COA from this new batch of R15 isn’t the COA that is linked after purchase? The COA that I was sent is from batch 2026061215 and the new batch is 2026091