Why domestic synthesis, US third-party testing, and domestic fulfillment matter when sourcing research peptides — and what to verify.
Much of the market repackages overseas material. "Made in the USA" should mean the compound is synthesized domestically — not just boxed here.
An independent US lab performing HPLC and mass spec on each lot is the verifiable part. Ask for the COA and the testing lab.
Lyophilized peptides are sealed to protect stability. Domestic fulfillment avoids long customs delays.