Buy Research Peptides in the USA
US-based supplier shipping same-day from Manhattan. Third-party tested, cold-chain shipped, discreet packaging. Research use only.
Our Most-Ordered Research Peptides
Every peptide below ships same-day from our Manhattan facility with a batch-matched third-party COA.
Why Buy Peptides from a US-Based Supplier
No Customs Risk
Peptides ordered from overseas suppliers routinely get held or destroyed by US Customs. Our shipments never cross a border — you get your order in days, not weeks (or never).
Cold-Chain Integrity
Reactive peptides degrade fast at room temperature. Our short domestic transit times mean your compounds arrive stable and full-potency. International shipments spend 2-3 weeks in variable-temperature transit.
Direct Support
Reply to any email and you reach the actual team, not a translated chatbot. COAs, tracking, and reconstitution questions get answered in hours.
Frequently Asked Questions
Is BioInfinity a US-based peptide supplier?▾
Yes. BioInfinity ships every order same-day from our Manhattan, NY facility. All research peptides are stored on-site in temperature-controlled inventory and shipped via USPS Priority or UPS with cold-chain packaging for reactive compounds.
Are your peptides tested for purity?▾
Every batch ships with a third-party Certificate of Analysis (COA) documenting HPLC purity, mass spectrometry confirmation, and endotoxin testing. COAs are available on each product page and included with your shipment.
What payment methods do you accept?▾
We accept Zelle, Venmo, Cash App, credit and debit cards (via PsiFi and Money.EU), and USDC stablecoin (via 3thix). Zelle typically clears fastest and is our most popular option among returning researchers.
Do you ship discreetly?▾
All shipments arrive in plain, unbranded packaging with no external references to the products inside. Your name and address are the only identifying information on the label.
How long does shipping take within the US?▾
Orders paid before 2:00 PM ET ship the same business day. USPS Priority typically delivers coast-to-coast in 2-3 business days. UPS Ground is 3-5 business days. Cold-chain shipments include gel packs sized for the transit route.
Are these research peptides intended for human use?▾
No. All BioInfinity peptides are sold strictly for in-vitro laboratory research and are not intended for human or veterinary consumption. Products are labeled 'Research Use Only' and are not FDA-approved for any therapeutic indication.
Ready to Order?
Browse the full catalog, or reach out to our team if you need help choosing.