Research library
Guides
-
Research Peptides vs Compounded vs FDA-Approved: What’s the Difference?
Three labels, three different legal positions. What FDA review, CGMP and the bulk-substance lists actually require of an approved drug, a compounded…
-
How to Spot Unreliable Peptide Vendors: 10 Red Flags (2026)
Ten red flags drawn from FDA enforcement letters, an FTC rule and published test-buys of online sellers — plus what each so-called…
-
Peptide Purity Testing Explained: HPLC, Mass Spec and Third-Party Labs
A methods guide to peptide purity testing: what RP-HPLC, mass spectrometry, amino acid analysis and endotoxin testing each measure, what the compendial…
-
Healing Peptides for Recovery & Tissue Repair: What the Evidence Shows
An evidence-graded hub for the recovery and tissue-repair cluster: BPC-157, TB-500 and thymosin beta-4, GHK-Cu and KPV, with the animal-versus-human split made…
-
What Are Peptides? A Plain-English Guide (2026)
A plain-English, referenced introduction to peptides: what they are, how they differ from proteins, how peptide drugs work, and how to judge…
-
Are Peptides Legal? US Regulatory Status in 2026
A date-stamped guide to US peptide regulation in 2026: the FD&C Act framework, 503A and 503B compounding, the bulk drug substances lists,…
-
How to Read a Peptide Certificate of Analysis (COA)
A field guide to reading a peptide certificate of analysis line by line — purity by HPLC, identity by mass spectrometry, peptide…
-
Growth Hormone Secretagogue Peptides Explained: GHRH vs GHRP
The hub page for the GH cluster: how GHRH analogues and ghrelin-receptor agonists differ mechanistically, what human evidence exists for each, and…
-
GLP-1 and Incretin Peptides Explained: Semaglutide, Tirzepatide, Retatrutide & More
A hub guide to the incretin class: how GLP-1, GIP and glucagon receptor agonists work, which are approved, what the trials found,…