Lab Guides

Lab Guide · 7 min read · Updated October 2026 Short answer: the number you see everywhere, “about 4 weeks

Bacteriostatic and sterile water differ by one ingredient: 0.9% benzyl alcohol. That changes how long a vial lasts, how you store it and how often you can use it. Full comparison, the 28-day rule, and where to find it in Canada.

GHK-Cu is supposed to be blue: copper bound to the GHK peptide absorbs orange-red light. But a blue vial only proves copper is present. Here is the chemistry, what purple or green means, and why KLOW and GLOW are blue too.

Turn lyophilized powder into an accurate, stable solution: which diluent to use, the 8-step lab procedure, concentration tables for every vial size, troubleshooting and storage.

Cold, dry and dark is the rule, but most degraded peptides are ruined by small mistakes. What breaks peptides down, and how to store powder and solutions properly.

Every peptide site shows a COA. Here is how to actually read one: HPLC, mass spectrometry, the 5-point checklist and 7 tricks that make a weak certificate look strong.