Peptide Manufacturers & Suppliers in USA
178 suppliers listed in USA.
Compare peptide manufacturers and suppliers in the USA serving pharmaceutical, biotechnology, and laboratory buyers. Listings include domestic manufacturers, CDMOs, compounding facilities, wholesalers, and research suppliers covering synthesis, development, analytical testing, and catalog supply. Verify each company's manufacturing location, quality documentation, and regulatory status before purchasing.
Directory listing last reviewed October 2026.
Featured listings are paid placements. Verified suppliers with a confidence score of 80 or above appear next, in an order that rotates daily; verification is a paid review of company ownership and documents. Confidence scores are set by our editorial review. Sort by highest score to rank every listing by confidence score alone.
Redline Bio LabsVerified
Conroe, Texas, United States • Retail Research Peptides
PX1 RESEARCHVerified
United States • Research Supplier
Daavy Research PeptidesVerified
Texas, United States • Research Supplier
Next Gen PepsVerified
United States • Research Supplier
Orion PeptidesVerified
USA (FL) • Research Supplier
StudzPeptidesVerified
Arizona, United States • Research Supplier
BulkGLPVerified
Dallas-Fort Worth, Texas, United States • Research Supplier
PeptagonVerified
United States • Retail Research Peptides
Bachem Holding AG
Switzerland / USA • CDMO
AmbioPharm
USA • CDMO
Asymchem
USA (NC) / China • CDMO
Sigma-Aldrich (Merck)
USA / Global • Chemical Supplier
Olympia Pharmacy
USA (FL) • Pharmacy
PeptidePure
USA • Pharmacy
Lonza Peptides
Switzerland / USA • CDMO
Hallandale Pharmacy
USA (FL) • Pharmacy
Red Rock Pharmacy
USA (UT) • Pharmacy
GenScript Biotech
USA / China • CDMO
CPC Scientific
USA / China • CDMO
Thermo Fisher Scientific
USA / Global • CDMO
Aragen Life Sciences
India / USA (CA) • CDMO
Veranova
USA • CDMO
SK pharmteco
Korea / USA • CDMO
Biosynth
Switzerland / Netherlands / USA • CDMO
Phoenix Pharmaceuticals
USA (CA) • CDMO
CSBio
USA (CA) • CDMO
CordenPharma Colorado
USA (Boulder, CO) • CDMO
Cambrex (Snapdragon Chemistry)
USA (Waltham, MA) • CDMO
PCI Pharma Services
USA (Philadelphia, PA) • CDMO
Ajinomoto Bio-Pharma Services
USA (Grove City, OH) / Belgium / Japan / India • CDMO
Biopeptide Co.
USA (San Diego, CA) • CDMO
Catalent Pharma Solutions
USA (NJ) • CDMO
Alfa Chemistry
United States • Chemical Supplier
BOC Sciences
United States • Chemical Supplier
Elite Synthetics
United States • Research Supplier
Peptide.Express
United States • Research Supplier
LabFirst Peptides
United States • Retail Research Peptides
Apicore (RK Pharma)
USA (East Windsor, NJ) • CDMO
Pure Rawz
USA • Research Supplier
AnaSpec
USA (CA) • Research Supplier
AminoVault
USA • Research Supplier
Protide Health
USA (Nevada) • Research Supplier
Ignite Peptides
USA (MN) • Research Supplier
EIDON Research
USA (CA) • Research Supplier
Full Scale Peptides
USA (FL) • Research Supplier
Unrivaled Peptides
USA • Research Supplier
Valkyrie Peptides
USA • Research Supplier
Ascension Peptides
USA (MO) • Research Supplier
FitAminos
USA (Arizona) • Research Supplier
LA Peptides
USA • Wholesale
Aries Peptide Research
USA (TX) • Research Supplier
Matexcel
United States • Life Science Supplier
LifeTein
USA • Service Provider
AAPPTec
USA (KY) • Chemical Supplier
Creative Biolabs
United States • Research Supplier
Prime Peptide Solutions
United States • Research Supplier
USA Peptide
USA (NY) • Research Supplier
Peptide Source
USA • Research Supplier
BioCollex Research
USA (MD) • Research Supplier
Verified Peptides
USA • Research Supplier
Advanced ChemTech
USA (KY) • Chemical Supplier
Oath Research
USA (AZ) • Research Supplier
PeakForm Peptides
USA • Research Supplier
Peptira
USA (NE) • Research Supplier
VivePeptides
USA • Research Supplier
NuRev Peptides
USA • Wholesale
Evolve Peptides
USA (WY) • Retail Research Peptides
Peptide Warehouse
USA • Research Supplier
Core Peptides
USA (FL) • Research Supplier
Peptidology
USA (AZ) • Research Supplier
Nationwide Peptides
USA (Tennessee) • Research Supplier
Hydro Research
USA • Wholesale
EZ Peptides
USA (NM) • Wholesale
Chem Labs X
USA (NV) • Research Supplier
GenX Peptides
USA • Research Supplier
Pepmic
USA / China • Service Provider
Restore Peptides
USA • Research Supplier
Combi-Blocks
USA (CA) • Chemical Supplier
Creative BioMart Cosmetic Ingredients
United States • Life Science Supplier
V8 Peptides
United States • Retail Research Peptides
Quanta Nova
United States • Retail Research Peptides
Bulkpeptides
USA • Wholesale
Blue Sky Peptide
USA • Research Supplier
Patriot Peptides
USA (Brookfield, MO) • Research Supplier
Koi Peptides
USA • Research Supplier
BioLongevity Labs
USA (Ohio) • Bulk Wholesale
Biotech Peptides
USA (NV) • Research Supplier
Peptide Partners
USA • Research Supplier
Empower Pharmacy
USA (TX) • Pharmacy
Peptide Supply
USA • Research Supplier
Sports Technology Labs
USA • Research Supplier
Pepta Labs
USA • Research Supplier
Cosmic Peptides
USA • Research Supplier
RetaPure
USA • Research Supplier
Lab Trust Peptides
USA • Research Supplier
Trusted Peptides
USA (NV) • Research Supplier
RS Synthesis
USA (KY) • CDMO
Wholesale Peptide
USA (FL) • Wholesale
Purity Peptides
USA • Research Supplier
Bulk Peptide Supply
USA (OK) • Wholesale
BioStrata Research
USA (FL) • Research Supplier
PurePeptide Labs
USA / Global • CDMO
KareBay Biochem
USA (NJ) • CDMO
Simple Peptides
USA (FL) • Research Supplier
Apollo Peptide Sciences
USA • Research Supplier
Vivitide
USA • CDMO
New England Peptide Center
USA (MA) • Research Supplier
Peptide California
USA (California) • Research Supplier
Oasis Labs
USA (Nevada) • Wholesale
Paramount Peptides
USA (CA) • Research Supplier
Pinnacle Peptides
USA (Panama operations) • Bulk Wholesale
AmideBio
USA (Colorado) • CDMO
Elabscience Bionovation Inc.
USA (Houston) • Manufacturer
Active Peptide Company
USA (Cambridge, MA) • Manufacturer
Peak Lab Peptides
USA (Watertown, SD) • Wholesale
Kalamazoo Peptide
United States • Research Supplier
Curo
United States • Retail Research Peptides
Peptides.com
United States • Chemical Supplier
C Suite Biologics
United States • Research Supplier
Vyal Labs
United States • Retail Research Peptides
VectorElab
United States • Research Supplier
ANKR Lab
United States • Retail Research Peptides
Optimized Aminos
United States • Retail Research Peptides
TrueCore Lab
United States • Research Supplier
99 Purity Wholesale
USA • Wholesale
Nexaph
USA • Bulk Wholesale
CanLab International
USA / Canada • Institutional
Geo Peptides
USA (Florida) • Research Supplier
Soma Chems
USA • Retail Research Peptides
Cernum Biosciences
USA • Research Supplier
Soma Peptides
USA • Research Supplier
Limitless Life Nootropics
USA • Research Supplier
Onyx Biolabs
USA (NC) • Retail Research Peptides
Bulk Peptides
USA (TX) • Wholesale
Peptide Pros
USA • Wholesale
Biopeptek
USA (Malvern, PA) • CDMO
Peptides Source
USA (PA) • Research Supplier
PeptideHQ
USA / Global • Wholesale
Alpha Omega Peptide
USA (FL) • Research Supplier
Scientific Aminos
USA • Wholesale
Peptide America
USA • Research Supplier
Molecular Edge Peptides
USA (CA) • Research Supplier
Ion Peptide
USA • Research Supplier
Zen Labs Wholesale
USA (Atlanta, GA) • Research Supplier
Licensed Peptides Wholesale
USA • Research Supplier
OROS Research
USA (CA) • Research Supplier
Valar Peptides
USA • Research Supplier
GenX Bio
USA (TX) • Research Supplier
NewBioRx (formerly New England Biologics)
USA (New Hampshire) • Research Supplier
Oneday Compounds
USA (Utah) • Wholesale
AMC Essentials
USA (NY) • Wholesale
Southern Aminos
USA (CA) • Chemical Supplier
PSPeptides
USA • Research Supplier
Costides
United States • Bulk Wholesale
IsoPure Peptides
United States • Research Supplier
Simms Research
United States • Research Supplier
Primus Sciences
United States • Research Supplier
Biogenesis Labs
United States • Retail Research Peptides
Research Labs
United States • Chemical Supplier
Sealed Peptides
United States • Research Supplier
Polaris Peptides
USA • Institutional
Wholesale Peptides Company
USA (Los Angeles, CA) • Wholesale
Validated Peptides
United States • Research Supplier
Spartan Peptides Wholesale
USA • Wholesale
Cenexa Labs
USA (WY) • Research Supplier
Swiss Chems
USA (NY) • Research Supplier
Royal Peptides
USA / Canada • Research Supplier
Darmerica
USA (FL) • Wholesale
Wholesale Peptide Supply
USA (Costa Mesa, CA) • Wholesale
Acrotein Chembio Inc.
USA (Alabama) • Chemical Supplier
Bulk Peptide Wholesale
USA (Oklahoma City, OK) • Wholesale
Apex Laboratory
USA • Research Supplier
Modern Aminos
USA • Wholesale
LiveWell Peptides
USA • Research Supplier
Peptide Sciences
USA (NV) • Research Supplier
Arctic Peptides
USA • Research Supplier
Champion Peptides
USA • Research Supplier
How do you choose a US peptide supplier?
The US market includes several distinct supplier models. Compare peptide manufacturers for in-house production, peptide CDMOs for development and scale-up, and research peptide suppliers for laboratory catalog products. Buyers seeking larger quantities can also review US bulk and wholesale suppliers.
How can you verify a domestic peptide supplier?
A US address does not prove that synthesis happens domestically. Check whether the listing identifies an in-house manufacturing site, batch-specific HPLC and mass-spectrometry documentation, third-party testing, and relevant FDA inspection or registration records. Use the directory's GMP, third-party tested, and COA available pages as verification starting points.
Should you source peptides in the USA or overseas?
Domestic sourcing can shorten shipping and simplify site visits, quality agreements, and regulatory documentation. Overseas manufacturers may offer broader capacity or lower pricing. Compare this directory with the Chinese peptide manufacturers list and verify the actual manufacturing site before requesting a quote.
Which CDMOs provide peptide development in the US?
US-sited peptide CDMOs with in-house production and GMP evidence on record in this directory include AmbioPharm, Veranova, CSBio, CordenPharma Colorado, Cambrex (Snapdragon Chemistry), PCI Pharma Services and Apicore (RK Pharma). Larger groups such as Bachem and Lonza also run US sites alongside production in Europe or Asia, so ask which facility will run your program. See all US peptide CDMOs, or send one specification to several at once.
Which US wholesale peptide suppliers publish third-party testing?
US wholesalers with third-party test results listed include NuRev Peptides, Hydro Research, EZ Peptides, Bulkpeptides, Oasis Labs and 99 Purity Wholesale. Most US wholesalers distribute product synthesized overseas, so ask for the manufacturing site and a COA matched to your lot, and confirm MOQs and net terms before a bulk order. Compare all US bulk and wholesale suppliers.
How many US research peptide suppliers are third-party tested?
51 of the 103 US research peptide vendors listed here publish third-party lab results. Check that each COA names an independent lab and matches the batch number on your vial. Our COA verification guide covers what to look for, and the US research supplier listshows each vendor's testing status.
Do US peptide manufacturers need FDA registration?
Facilities that manufacture drugs or active pharmaceutical ingredients for the US market must register with the FDA and list their products. Ask a manufacturer for its FEI number and confirm it in the FDA's drug establishment registration database. Catalog vendors selling research-use-only peptides are usually not registered, which is one reason their documentation deserves closer checking.
Can compounding pharmacies buy peptide APIs from US suppliers?
A 503A compounding pharmacy must use bulk drug substances made by an FDA-registered establishment, with a valid certificate of analysis, and the substance must be eligible for compounding. Many research-grade wholesalers do not meet that bar. Compare US compounding pharmacies and GMP-certified manufacturers for clinical supply.
Has the FDA taken action against US peptide suppliers?
Yes. 6 US-listed suppliers have an open FDA warning letter or import alert recorded in this directory: Peptide Partners, Empower Pharmacy, Biopeptek, Swiss Chems, Royal Peptides and Darmerica. The warning letters cite unapproved new drugs, misbranding or GMP violations, and each profile links the FDA record. Search a supplier's name in the FDA warning letter database before ordering.