Article library
Guides, legit checks, and explainers
46 original articles for USA research buyers — paperwork-first, opinionated, and dated. Not medical advice.
Legit checks
Is Purgo Labs legit?
Independent take on whether Purgo Labs is legit for research buyers — documentation, shipping, payments, and caveats. Score 92/100 on UPV’s Transparency Index.
Is Northbound Research legit?
Independent take on whether Northbound Research is legit for research buyers — documentation, shipping, payments, and caveats. Score 84/100 on UPV’s Transparency Index.
Is Cedar Analytical legit?
Independent take on whether Cedar Analytical is legit for research buyers — documentation, shipping, payments, and caveats. Score 88/100 on UPV’s Transparency Index.
Is Harbor Peptide Supply legit?
Independent take on whether Harbor Peptide Supply is legit for research buyers — documentation, shipping, payments, and caveats. Score 76/100 on UPV’s Transparency Index.
Is Atlas Bench Chem legit?
Independent take on whether Atlas Bench Chem is legit for research buyers — documentation, shipping, payments, and caveats. Score 81/100 on UPV’s Transparency Index.
Is Lumen Forge Bio legit?
Independent take on whether Lumen Forge Bio is legit for research buyers — documentation, shipping, payments, and caveats. Score 69/100 on UPV’s Transparency Index.
Is Pine Ridge Peptides legit?
Independent take on whether Pine Ridge Peptides is legit for research buyers — documentation, shipping, payments, and caveats. Score 73/100 on UPV’s Transparency Index.
Is Vector Vial Co. legit?
Independent take on whether Vector Vial Co. is legit for research buyers — documentation, shipping, payments, and caveats. Score 78/100 on UPV’s Transparency Index.
Comparisons
Purgo Labs vs Cedar Analytical
Head-to-head comparison of Purgo Labs and Cedar Analytical for USA research buyers — Transparency Index scores, COA habits, shipping, and who fits which lab workflow.
Purgo Labs vs Harbor Peptide Supply
Head-to-head comparison of Purgo Labs and Harbor Peptide Supply for USA research buyers — Transparency Index scores, COA habits, shipping, and who fits which lab workflow.
Northbound Research vs Pine Ridge Peptides
Head-to-head comparison of Northbound Research and Pine Ridge Peptides for USA research buyers — Transparency Index scores, COA habits, shipping, and who fits which lab workflow.
Cedar Analytical vs Atlas Bench Chem
Head-to-head comparison of Cedar Analytical and Atlas Bench Chem for USA research buyers — Transparency Index scores, COA habits, shipping, and who fits which lab workflow.
Lumen Forge Bio vs Vector Vial Co.
Head-to-head comparison of Lumen Forge Bio and Vector Vial Co. for USA research buyers — Transparency Index scores, COA habits, shipping, and who fits which lab workflow.
Harbor Peptide Supply vs Vector Vial Co.
Head-to-head comparison of Harbor Peptide Supply and Vector Vial Co. for USA research buyers — Transparency Index scores, COA habits, shipping, and who fits which lab workflow.
Atlas Bench Chem vs Purgo Labs
Head-to-head comparison of Atlas Bench Chem and Purgo Labs for USA research buyers — Transparency Index scores, COA habits, shipping, and who fits which lab workflow.
Pine Ridge Peptides vs Northbound Research
Head-to-head comparison of Pine Ridge Peptides and Northbound Research for USA research buyers — Transparency Index scores, COA habits, shipping, and who fits which lab workflow.
Purgo Labs vs Northbound Research
Head-to-head comparison of Purgo Labs and Northbound Research for USA research buyers — Transparency Index scores, COA habits, shipping, and who fits which lab workflow.
Cedar Analytical vs Harbor Peptide Supply
Head-to-head comparison of Cedar Analytical and Harbor Peptide Supply for USA research buyers — Transparency Index scores, COA habits, shipping, and who fits which lab workflow.
Best-of guides
Best peptide vendors in the USA
UPV’s 2026 shortlist of USA research peptide vendors ranked by documentation, shipping honesty, entity clarity, and RUO labeling — not hype.
Best BPC-157 vendors for research buyers
Which USA research catalogs show stronger lot paperwork for BPC-157 SKUs — and how to verify certificates before you order.
Best retatrutide research vendors in the USA
How to shortlist USA vendors selling retatrutide-labeled research materials with an emphasis on lot-specific assays and stock honesty.
Best documented peptide vendors
USA research peptide vendors that prioritize public certificates, lot IDs, and conservative claims language.
Best NAD+ research vendors
USA research vendors for NAD+ with an emphasis on measured content assays, lot IDs, and transparent shipping notes.
Best budget peptide vendors in the USA
Lower list-price USA research peptide vendors that still give you a path to lot paperwork — and when cheap becomes expensive.
Peptide buying guides
BPC-157 research buying guide
Practical USA-focused buying guide for BPC-157 research materials — vendor shortlist, COA checks, and Research Use Only boundaries.
TB-500 research buying guide
Practical USA-focused buying guide for TB-500 research materials — vendor shortlist, COA checks, and Research Use Only boundaries.
CJC-1295 research buying guide
Practical USA-focused buying guide for CJC-1295 research materials — vendor shortlist, COA checks, and Research Use Only boundaries.
Epithalon research buying guide
Practical USA-focused buying guide for Epithalon research materials — vendor shortlist, COA checks, and Research Use Only boundaries.
Retatrutide research buying guide
Practical USA-focused buying guide for Retatrutide research materials — vendor shortlist, COA checks, and Research Use Only boundaries.
NAD+ research buying guide
Practical USA-focused buying guide for NAD+ research materials — vendor shortlist, COA checks, and Research Use Only boundaries.
COA & testing
What labs test on research peptides
A buyer-oriented overview of common research peptide assays — identity, purity, content, and optional sterility/endotoxin panels.
Fake peptide COA red flags
Practical red flags for forged or recycled peptide certificates — mismatched lots, undated PDFs, and labs that do not resolve.
Third-party peptide testing explained
What “third-party tested” should mean for research peptides — independent labs, lot linkage, and limits of a single PDF.
HPLC purity vs content assays
Why peptide purity percentages and measured content assays answer different questions — and which one your purchasing SOP should demand.
How to read a peptide COA
Plain-language walkthrough of certificate of analysis fields research buyers should verify before ordering peptides.
Shipping & payments
Bulk peptide ordering for labs
How research labs can approach bulk peptide purchasing — pilot lots, paperwork, POs, and vendor scorecards.
How to compare peptide pricing
A research buyer’s method for comparing peptide prices across USA vendors — landed cost, COA gates, and fake strikethroughs.
Peptide vendor payment methods compared
Card, ACH, wire, and crypto rails at research peptide vendors — practical recourse differences for USA lab buyers.
Peptide shipping in the USA
Domestic shipping norms for USA research peptide vendors — tracking, packaging claims, summer heat, and receiving checks.
Cold-chain claims on research peptides
How to treat cold-pack and insulated-shipping claims from USA research peptide vendors — questions to ask and records to keep.
Explainers & FAQ
Inside the UPV Transparency Index
How USA Peptide Vendors scores research catalogs on documentation, entity clarity, shipping honesty, and RUO labeling.
How UPV reviews peptide companies
Editorial process behind UPV vendor pages and legit checks — what we open, what we refuse to invent, and how pages get updated.
Peptide vendor red flags
Concrete red flags when evaluating USA research peptide vendors — from missing COAs to irreversible-only payments and claim contradictions.
Questions to ask a peptide vendor before you order
A research-buyer checklist covering lots, assays, shipping, entity clarity, and RUO labeling before checkout.
Research Use Only peptides FAQ
Clear answers on what Research Use Only means for peptide catalogs — labeling, marketing boundaries, and buyer responsibility.
USA vs overseas peptide vendors
Shipping, customs friction, documentation norms, and research procurement tradeoffs for US-based labs choosing domestic vs overseas catalogs.