Shipping peptide samples from California's biotech corridors
California sends us more samples than any state except Florida, and they cluster in three corridors: San Diego from Torrey Pines and Sorrento Valley, the Bay Area from South San Francisco, Emeryville and Palo Alto, and the Los Angeles basin from Westwood, Duarte and Irvine. All three have late FedEx and UPS air pickups, so a package handed over in the afternoon in San Diego or San Francisco is logged in Sun City Center the next business morning.
The academic and institutional work comes from UCSF, Stanford, UCLA, UC San Diego, UC Davis, Scripps Research, the Salk Institute, City of Hope and Cedars-Sinai. Most of those submissions are identity and purity checks on custom-synthesised sequences before an in-vivo run, and they are sensitive to method detail, so we state the gradient, column and detection wavelength on the Certificate of Analysis rather than reporting a bare percentage.
The commercial side is different. California compounding pharmacies and telehealth suppliers send GLP-1 material - semaglutide, tirzepatide, retatrutide - for independent verification, usually because a client or the California State Board of Pharmacy wants a certificate that did not come from the manufacturer. For those submissions we run purity by RP-HPLC, confirm molecular weight by LC-MS, and add net content when the label claims a specific milligram fill.
Three-hour time difference
West Coast afternoon pickups still make next-business-day delivery to Florida.
Air only
Ground from California takes four to five days; use FedEx or UPS overnight for lyophilized material.
Common submissions
Custom-synthesis identity checks from academia, GLP-1 verification from pharmacies and suppliers.