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Research Articles & Guides

Educational resources on peptide research, purity testing, vendor evaluation, and the evolving regulatory landscape. Updated March 2026.

Buying Guides

Buying Guides

Where to Buy BPC-157 in 2026: Verified Sources After Peptide Sciences Shutdown

Updated April 2026 — Where to buy BPC-157 after Peptide Sciences closed. Price comparison, purity verification checklist...

Buying Guides

Where to Buy TB-500 in 2026: Verified Sources & Pricing Guide

Updated April 2026 — Where to buy TB-500 (Thymosin Beta-4) after major vendor shutdowns. Purity verification, pricing fr...

Guides

Guides

Best Peptide Vendors 2026: How to Choose a Verified Supplier

Updated April 2026 — How to evaluate peptide vendors after Peptide Sciences shut down. Third-party testing checklist, re...

Guides

HPLC vs Mass Spectrometry: How Peptide Purity and Identity Are Tested

HPLC measures purity, mass spectrometry confirms identity. How each technique works, why both are required on a legitima...

Guides

Peptide COA Guide: How to Read & Verify a Certificate of Analysis

Step-by-step guide to reading and verifying peptide COAs. HPLC chromatograms, mass spectrometry data, batch numbers, and...

Guides

Peptide Purity Testing Explained: HPLC, Mass Spec & Third-Party Verification

How peptide purity is measured. HPLC chromatography, mass spectrometry, endotoxin testing, third-party vs internal testi...

Guides

Peptide Storage & Handling Guide: Best Practices for Research

How to store research peptides properly. Lyophilized storage temperatures, laboratory handling, shelf life, freeze-thaw ...

Guides

What Are Research Peptides? A Complete Introduction

Introduction to research peptides. What they are, how they're made, why they're used in laboratory research, purity stan...

Legal & Regulatory

Legal & Regulatory

Are Research Peptides Legal in 2026? US Status Explained

Updated April 2026 — Current legal status of BPC-157, TB-500, semaglutide and other research peptides in the US. Categor...

Legal & Regulatory

FDA Category 2 Peptides: Full List & What It Means for 2026

Complete list of FDA Category 2 peptides including BPC-157, TB-500, and ipamorelin. What Category 2 means, what's prohib...

Market Updates

Market Updates

Best Peptide Vendors 2026: Who's Still Shipping After the Shutdowns

Updated April 2026 — The best research peptide vendors still operating after Peptide Sciences and Science.bio shut down....

Market Updates

Peptide Vendor Shutdown Tracker 2026 — Who's Still Operating?

Updated April 2026 — Peptide Sciences shut down, Science.bio closed, Transparent Labs outage, Amino Asylum raided. Full ...

Market Updates

Science.bio Closed Permanently (January 2026) — Full Status Update

Science.bio is permanently closed as of January 2026. No advance warning was given. Here's the full shutdown timeline, w...

Market Updates

Where to Buy Research Peptides in 2026 — Post-Shutdown Vendor Guide

Updated April 2026 — Peptide Sciences and Science.bio are both closed. Here's how to evaluate the remaining vendors on p...