Research Guide · 8 min read · Updated 2026-08-01
How to Reconstitute & Store Research Peptides: The Complete Guide
More research peptides are ruined by bad handling than by bad suppliers. This guide gives your laboratory a single, correct protocol: how to reconstitute lyophilised peptides, how long each compound keeps, and the five handling mistakes that destroy peptide integrity.
The Correct Reconstitution Protocol
Bring the vial to room temperature before opening to prevent condensation. Using a sterile syringe, draw bacteriostatic water and add it slowly down the inside wall of the vial — never directly onto the powder cake. Swirl gently until fully dissolved. Never shake: mechanical shear damages peptide bonds and causes aggregation.
Larger peptides such as Tesamorelin can dissolve more slowly than small ones. If your TB-500 batch documentation identifies a larger peptide, give it time and gentle swirling rather than force.
Storage Temperatures and Shelf-Life Windows
Lyophilised peptides: -20°C for long-term storage (typically 24+ months), protected from light for sensitive compounds such as Semax, GHK-Cu and Melanotan II.
Reconstituted peptides: refrigerate at 2–8°C. Windows vary by compound — BPC-157 keeps 28 days, TB-500 and Ipamorelin 21 days, CJC-1295 (No DAC) and Tesamorelin 14 days. Mark the reconstitution date on every vial.
The Five Handling Mistakes That Destroy Peptides
One: shaking the vial instead of swirling. Two: repeated freeze-thaw cycles of reconstituted solution — aliquot instead. Three: leaving lyophilised vials at room temperature for weeks. Four: light exposure for sensitive compounds. Five: using the wrong solvent — always confirm solubility on the Certificate of Analysis before reconstitution.
Documentation You Should Keep
Retain the batch COA with your study records. It documents HPLC purity, MS identity and appearance for the exact material you used — essential for reproducibility and for answering reviewer questions about compound provenance.
