Peptide Vendor Directory

Chemyo is one of the most respected SARMs vendors in the research chemical community, known for exceptional quality control and transparency. Their peptide offering is very limited (primarily MK-677), but they're included because MK-677 is commonly used alongside peptide protocols. If they expand into peptides, they'd likely be top-tier based on their track record.

Biotech Peptides is a highly-rated US vendor with 88+ peptides synthesized and lyophilized domestically. They use HPLC and mass spectrometry for quality control, offer same-day shipping, and provide a 30-day money back guarantee. Product ratings average 4.8+ stars across their catalog, making them one of the most trusted options.

Limitless Life Nootropics (now Limitless Biotech) is a well-regarded US-based vendor with over 90 research peptides manufactured under GMP protocols. They emphasize quality with HPLC, LC-MS testing, sterility screening, and COAs for every order. Highly recommended in Reddit peptide communities for quality and reliability.

Receptor Chem is a top-tier UK-based SARMs vendor known for exceptional quality control and analytical testing. While their peptide offering is limited to MK-677, they're included for their relevance to the broader research chemical ecosystem and their reputation for purity. Best option for UK/European researchers.

Peptide Pros has been operating since 2013 and claims over 15,000 five-star reviews. They offer a comprehensive catalog of USA-made peptides, SARMs, and research chemicals with COAs, free priority shipping over $150, and a 25% member discount. One of the longest-operating vendors in the space.

Sports Technology Labs is a rising US-based vendor that has built a strong reputation for quality SARMs and is expanding into peptides. They emphasize quality control with USP-grade solvents, glass bottles, and accredited third-party testing. Their peptide selection includes popular compounds and convenient stack options. Well-regarded by the Reddit community.

Paradigm Peptides has been operating since 2014, offering pharmaceutical-grade peptides, SARMs, and nootropics. They provide third-party testing and COAs, and are known for educational content on their blog. Generally well-regarded in the community with a solid but not top-tier reputation.

Research Chemical is a newer US-based vendor that has quickly built a strong reputation, evidenced by a 4.9 Trustpilot rating. They ship peptides on ice in lyophilized form, emphasizing stability and quality. Third-party testing with certificates is provided for every batch. Good option for researchers who want quality with fast shipping.

Swiss Chems is a mid-range vendor offering peptides, SARMs, and nootropics with same-day shipping and independent testing. They have a broad product catalog and accept multiple payment methods including crypto. Community reception is mixed - generally acceptable quality but not considered top-tier.

BuyDeus is the official online distributor for Deus Medical, shipping worldwide from a European warehouse. They offer pharmaceutical-grade peptides manufactured in a GMP-certified lab in India, including hard-to-find GLP-1 agonists. Popular in bodybuilding communities with 5+ years of operation, though shipping times to the US are longer.

Umbrella Labs is a well-established US-based vendor with a massive catalog spanning SARMs, peptides, and nootropics. They stand out for unique delivery formats including nano liposomals and ethosomals. Third-party testing is credentialed and COAs are provided. Generally well-regarded in the community with good quality standards.

Pinnacle Peptides is a US-based peptide manufacturer (not just a reseller) that synthesizes peptides in-house using both automated and manual synthesizers. They guarantee 99%+ purity with HPLC and Mass Spec verification at every production stage. Their additive-free, TFA-free peptides are among the highest quality available. Notable for carrying GLP-1 agonists alongside traditional research peptides.

Direct Peptides is a UK-based vendor standing out for offering peptides in multiple formulations including vials, nasal sprays, capsules, and pre-mixed pens. They ship internationally and offer bulk savings through twin and quad packs. A solid option especially for those wanting alternative delivery formats.

GenX Peptides is one of the longer-running dedicated peptide vendors in the US market, operating since 2013. They focus exclusively on peptides (no SARMs), offering TFA-free, HPLC/MS-tested products made in the USA. Their catalog includes both individual peptides and blends. Solid choice for researchers wanting a peptide-specialist vendor.

Core Peptides is a USA-based vendor producing peptides in cGMP facilities with quality control procedures and COAs. They offer free shipping on orders over $200 and have peptide blends available. A solid mid-tier option but with less community validation than more established vendors.

PureRawz is a large US-based vendor with one of the widest product catalogs in the research chemical space. They offer peptides in multiple formats including vials, nasal sprays, and capsules. Third-party testing is provided. Community reception is mixed — generally decent but not top-tier for peptides specifically. Better known for SARMs.

Nootropic Source is the go-to vendor for cognitive and nootropic peptides, offering the widest selection of Selank and Semax variants (including NA and Amidate forms) in convenient nasal spray format. They also carry some healing peptides like BPC-157 and TB-500. Best for researchers focused on neuropeptides and nootropics.

PeptidePure is a unique clinician-only peptide platform requiring NPI verification for access. They operate within a formal observational research framework (45 CFR 46) and source from ISO 9001/cGMP facilities. Not for the general research community — designed specifically for licensed healthcare professionals running peptide protocols. Premium positioning with strong compliance focus.

Trident Peptides is a UK-based vendor offering competitive pricing on research peptides with fast domestic delivery. Good option for UK and European researchers who want to avoid customs complications. Still relatively new with limited community track record compared to established US vendors.

Behemoth Labz is a US-based vendor offering a broad catalog of SARMs, peptides, and research chemicals in multiple delivery formats. They carry some unique peptide blends and newer compounds. Quality is generally acceptable but community feedback is mixed compared to dedicated peptide-only vendors.

Blue Sky Peptide is a budget-friendly US vendor operating since 2013. They offer peptides and research liquids at competitive prices with a 5% rewards program. However, the community reception is mixed with some concerns about consistency and product quality compared to premium vendors.

USA Peptide claims to be one of the oldest peptide vendors in the US market with 22+ years of operation. While the longevity claim is notable, the website is sparse on details and there's limited community discussion about them. May be a solid option for those who value longevity, but do your own due diligence.

Enhanced Peptides is a budget-focused US vendor offering peptides, SARMs, and research chemicals at competitive prices with frequent sales. USA manufactured with 99% purity claims. A newer entrant with less community track record, but a good option for cost-conscious researchers.

Warrior Makers is an active US-based peptide vendor with one of the broader catalogs in the space — 41 peptides plus supplements, topicals, and merch. They ship to the US, UK, and Canada via FedEx 2-Day with a shipping guarantee. However, their payment process is notably unusual: credit card payments are handled via manually-sent payment links during a narrow daily window, and they also accept Zelle/Venmo/CashApp with explicit instructions to never mention product names in memos. Premium pricing across the board.

Geo Peptides is a budget-friendly Florida-based peptide vendor. They offer competitive pricing on popular research peptides with COAs available. A good option for budget-conscious researchers, though the lower price point may reflect differences in quality control compared to premium vendors.

PharmaGrade Store is an internationally-focused peptide vendor offering worldwide shipping with HPLC-purified and Mass Spec-analyzed products. They're a good option for researchers outside the US who struggle to find reliable vendors. However, being a newer entrant with limited community verification, extra due diligence is recommended.

Xcel Peptides is a US-based vendor offering research peptides with standard quality controls. Their website requires account registration to browse products, which limits transparency. A newer entrant with minimal community reviews, making it harder to assess compared to more established vendors.

American Research Labs is a US-based vendor selling research peptides including GLP-1 agonists. Their website requires JavaScript to load product data, making verification difficult. Limited community track record and reviews make it a less vetted option compared to established competitors.

Soma Chems is a newer US vendor offering research peptides with 99%+ purity claims and sterility testing. They appear connected to the former Amino Asylum brand. Very limited community track record makes it difficult to assess reliability, though their quality claims are standard for the industry.

Peptide Warehouse operates as a B2B wholesale peptide supplier, offering bulk pricing on common research peptides. Best suited for labs and businesses ordering in volume rather than individual researchers. Limited product information and community feedback makes independent quality verification difficult.

Penguin Peptides is an active US-based research peptide vendor operating out of Sheridan, Wyoming. They offer a broad catalog including GLP-1 analogs, BPC-157, and other popular research peptides with third-party testing. Relatively new with limited community reputation — the shipping policy oddly references 'Injectify.is' which raises questions about their actual operational identity.

Modern Aminos is an active US-based research peptide vendor with a strong compliance-first approach — requiring account registration and 21+ age verification to even view their catalog. They emphasize third-party multi-vial batch testing with COA matching. However, the locked-down catalog makes it impossible to evaluate their product range or pricing without creating an account.

Elite Biogenix is an active US-based vendor selling both research peptides and liquid SARMs. Their peptide catalog is small (BPC-157, TB-500, GHK-Cu) but they offer a broader range of SARMs including MK-677, RAD-140, Ostarine, and Cardarine. They emphasize third-party lab verification and induction-sealed bottles, and accept crypto payments alongside credit cards and e-checks.

Simple Peptide (simplepeptide.com — singular, distinct from the dead simplepeptides.com) is an active US-based vendor emphasizing cGMP-compliant manufacturing and solid-phase peptide synthesis. They offer same-day FedEx 2-Day shipping and have a US-based phone support team. Like Modern Aminos, their entire catalog is gated behind account registration, making it impossible to evaluate products or pricing without signing up.