Peptide Sciences Has Closed — Vetted Research-Peptide Alternatives

Peptide Sciences (peptidesciences.com), one of the longest-running research-peptide suppliers, has announced it is voluntarily shutting down and discontinuing the sale of its research products. Its website no longer processes orders. If you previously sourced research peptides there, here are established vendors to consider instead.

Prof. Peptide is an independent research-peptide information and comparison site. We are not affiliated with, endorsed by, or a successor to Peptide Sciences, and we do not sell or represent its products. “Peptide Sciences” is referenced here solely to report its publicly announced closure and to help researchers find other suppliers.

What happened

In its own public notice, Peptide Sciences stated it has discontinued operations and will continue to protect its brand and trademarks. In practical terms, the site no longer fills orders — and, per the company's own statement, any third party claiming to be a successor or to sell “Peptide Sciences” products is not affiliated with the original company.