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★ Featured

How to Read a Certificate of Analysis (and Spot Red Flags)

A Certificate of Analysis is only as good as the lab behind it. Learn what every section means, which numbers matter most, and the warning signs that a COA might not be worth the paper it is printed on.

PeptideWatchdog Team · Feb 14, 2026 · 8 min read
📜 Testing & Purity

How to Read a Certificate of Analysis (and Spot Red Flags)

A Certificate of Analysis is only as good as the lab behind it. Learn what every section means, which numbers matter most, and the warning signs that a COA might not be worth the paper it is printed on.

PeptideWatchdog Team · Feb 14, 2026 · 8 min read
🔬 Testing & Purity

HPLC Purity Testing Explained: What the Numbers Actually Mean

High-Performance Liquid Chromatography sounds complex, but the output is straightforward once you know what to look for.

PeptideWatchdog Team · Feb 08, 2026 · 6 min read
❄ Guides

The Complete Peptide Storage Guide: Temperature, Light, and Reconstitution

Proper storage can mean the difference between a viable research compound and an expensive vial of degraded product.

PeptideWatchdog Team · Jan 30, 2026 · 5 min read
⚖ Testing & Purity

Why Mass Spec Matters: The Identity Problem in Research Peptides

A peptide can test 99% pure and still be the wrong compound entirely. Here is how identity confirmation catches what purity testing misses.

PeptideWatchdog Team · Jan 22, 2026 · 7 min read
📈 Industry News

Q4 2025 Vendor Transparency Report: Trends and Takeaways

Our quarterly look at testing trends across the vendor landscape.

PeptideWatchdog Team · Jan 15, 2026 · 10 min read
💧 Guides

Reconstitution 101: Bacteriostatic Water, BAC, and Proper Technique

The basics of reconstituting lyophilized peptides for research use.

PeptideWatchdog Team · Jan 08, 2026 · 4 min read
⚠ Industry News

Fake COAs Are More Common Than You Think: How to Verify

We found multiple vendors using fabricated or template-based Certificates of Analysis.

PeptideWatchdog Team · Dec 20, 2025 · 6 min read