Read the paperwork before you trust the vendor.
coaindex is an independent, plain-language reference for research peptides: how to read a certificate of analysis, how to tell a real third-party lab test from a fake, what happens when a source shuts down, and how common blends are actually put together. Research use only.
vettingVetting & COAs
Best Peptide Sources on Reddit (2026): What the Threads Actually Say
Reddit bans peptide vendor rankings; what survives is a method: demand a batch-specific COA that verifies on a third-party lab's own database. Here's how.
How to Read a Peptide COA: Real vs Fake (with a Worked Janoshik Example)
A peptide COA is real only when a named lab ran both HPLC and MS and you can reopen that exact record yourself. Here is how to verify one and catch a fake.
Peptide Vendor Red Flags: 9 Signs of a Scam Source
The biggest peptide vendor red flag is a third-party COA you cannot verify yourself. Here are 9 signs of a scam source you can check in under two minutes.
closed-vendorClosed vendors
Amino Asylum Shut Down: What Happened and How to Vet a Replacement Source (2026)
Amino Asylum's store went dark in June 2025 and hasn't returned. Here's what's confirmed, what's rumor, and how to vet a replacement source on real COAs.
Peptide Sciences Is Closing: Vetted Alternatives and How to Choose (2026)
Peptide Sciences went dark in early 2026. Dispute any pending charge, then vet every replacement vendor on named, third-party lab COAs before you pay a cent.
blendBlends
Glow Peptide Blend (GHK-Cu + TB-500 + BPC-157): Research Guide and Where to Buy
The Glow blend co-lyophilizes GHK-Cu, TB-500, and BPC-157 for research use only. See the reconstitution concentrations and how to check a COA before you buy.
KLOW Peptide Blend (BPC-157 + TB-500 + GHK-Cu + KPV): Explainer and Where to Buy
KLOW is a research-use-only vial blending BPC-157, TB-500, GHK-Cu, and KPV. Here is what each peptide is, the reconstitution math, and how to vet a vendor COA.
Wolverine Peptide Blend (BPC-157 + TB-500): Research Guide and Where to Buy
The Wolverine peptide blend is a research-use-only 1:1 mix of BPC-157 and TB-500. Here is the reconstitution math and how to vet a vendor COA before buying.