How we source.

Every peptide begins as a sequence of amino acids in a solid-phase synthesizer. Our partner facilities in Hangzhou and Ljubljana use Fmoc chemistry on Wang resins, coupling residues one by one until the full chain is built.

Then we test, and test, and test again. Reverse-phase HPLC, LC-MS, endotoxin, bioburden, residual solvent. A single lot touches seven analytical instruments before it reaches the fill line.