Want to test your vendor's product yourself? Here's how — need advice

Reship arrived today. Properly packed this time — insulated box, two gel packs, vial cushioned in foam. Reconstituted and the solution is perfectly clear. Night and day difference from the first shipment. Going to send a sample to Janoshik for HPLC testing just to have a baseline since I'm still a bit nervous about this vendor. Will update with results. Thanks everyone for the guidance — probably saved me from injecting degraded product.

Good call on testing it anyway. Even with proper shipping, it's worth establishing a baseline with any vendor, especially after an incident like this. For anyone following along — Janoshik peptide HPLC testing is currently $120 per sample with about a 10-day turnaround. You need to send roughly 2-3mg of product (tiny amount from the vial). They provide detailed purity analysis and identify any major degradation products. Well worth it for peace of mind.