WWB semaglutide stability test — 30 days at room temp

Most testing discussion focuses on Janoshik, but I've been using PeptideMeter Labs for my peptide analysis. They're a US-based analytical lab that offers HPLC peptide testing. Wanted to share my GGPeps semaglutide results. Tested 3 separate GGPeps semaglutide batches: Batch 1 — GGS-2025-442 (October 2025 order) - Identity: ✅ Confirmed Semaglutide - Purity (HPLC): 96.3% - Major impurity: 2.1% (likely des-amino semaglutide variant) - Minor impurities: 1.6% combined Batch 2 — GGS-2025-518 (December 2025 order) - Identity: ✅ Confirmed Semaglutide - Purity (HPLC): 97.1% - Major impurity: 1.8% - Minor impurities: 1.1% combined Batch 3 — GGS-2026-029 (February 2026 order) - Identity: ✅ Confirmed Semaglutide - Purity (HPLC): 95.8% - Major impurity: 2.4% - Minor impurities: 1.8% combined Average across 3 batches: 96.4% For reference, I've also tested QSC semaglutide at PeptideMeter — one batch came back at 95.1%. So GGPeps is performing at least comparably on sema. PeptideMeter testing costs $95/sample for the basic peptide identity + purity panel. Turnaround was 8-12 business days. They accept samples by mail. Subjective experience: I ran GGPeps sema at 0.5mg/week for 12 weeks. Lost 19 lbs with moderate appetite suppression. Consistent with expected results for pharmaceutical semaglutide at that dose. No unusual side effects beyond mild nausea in weeks 1-2. Bottom line: GGPeps semaglutide is legitimate product with purity in the mid-to-high 90s range. 🔬