Peptide Sciences is a well-known US supplier focused on the domestic research market. PeptidesFromChina.co offers an alternative for buyers who want direct factory access, broader catalog depth, and batch-tested compounds without the US reseller markup.
Peptide Sciences purchases peptides from overseas manufacturers and sells through the US market. PeptidesFromChina.co connects research buyers directly to the Chinese synthesis facility — same origin, shorter chain, lower cost basis.
Every batch is tested by the manufacturer for purity and concentration as part of routine quality control, using methods such as HPLC and LC-MS. Detailed product specifications — including analytical and manufacturing quality parameters — are published for each compound. For select high-demand compounds, independent third-party lab verification is also available.
Our catalog covers 73+ research compounds including GLP-1 agonists (Semaglutide, Tirzepatide, Retatrutide), growth peptides, nootropics, longevity peptides, and reconstitution supplies. Stock is verified per-order against the active manufacturing batch — no speculative pre-stocking.
The PeptidesFromChina.co process: submit your request → pay $10 processing deposit → we verify stock with the facility → you approve the confirmed invoice → pay the final amount → ship. No surprises. No auto-billing. The deposit is fully credited to the final invoice.
Shipping is $55–$60 standard or $75 express per parcel. Estimated transit is 15–20 days standard and 7–12 days express. Final cost depends on the supplier, destination, and parcel count.