Researcher verification

Purity HPLC

HPLC stands for High-Performance Liquid Chromatography — the gold-standard method for measuring exactly what's in a vial. It confirms the compound is what the label says it is, and shows what percentage of the vial is the actual peptide versus byproducts or impurities from manufacturing.

Quantity HPLC

This test verifies that the amount of peptide listed on the label is actually what's in the vial — no more, no less. It's a check against underfilling or inconsistent dosing between batches.

Endotoxin

Endotoxins are byproducts of bacterial cell walls that can remain even after bacteria are killed, and they can trigger an immune response if injected. This test measures endotoxin levels to confirm they fall below safe research thresholds.

Heavy Metals

This test screens for trace metals, like lead, arsenic, or cadmium, that can sometimes be introduced during raw material sourcing or manufacturing.

Caveat Even when trace amounts are detected, the levels found are typically so small that they fall far below any threshold associated with measurable health effects — but we test anyway because "trace" should mean trace, not "unknown."

Residual Solvents

Solvents are sometimes used during the synthesis or purification process. This test confirms that any solvent residue left behind is at or near zero, well under recognized safety limits.

Sterility

This test confirms the lyophilized, freeze-dried peptide is free of bacterial and fungal contamination before it's ever shipped.

Caveat Sterility testing happens on the powder itself — reconstituting with bacteriostatic water afterward doesn't "create" sterility, it just helps prevent new bacterial growth once you've opened and are using the vial. That's exactly why testing the lyophilized product matters: it's the only real checkpoint for what was in the vial from the start.