Human studies
Trials in people, graded by size, design, outcomes, and maturity.
Peptide info online is a mess of hype and fear.
Understand any peptide.
24 peptide evidence records51 linked sources129 reviewed answers
We grade the actual evidence—human and animal studies separately—and link every source so you can check our work.
HOW EVIDENCE IS GRADED
How strong is the evidence, really?
Animal and cell studies
Laboratory findings stay separate from evidence in people.
1/5 · Very limited
2/5 · Early
3/5 · Developing
4/5 · Substantial
5/5 · Mature
The grades measure how much research exists—not whether a peptide works or whether it is right for you.
WHAT CHANGED
What changed, and when
Every new study, FDA action, sport-rule change, and record update shows its date and source.
NEWS & ANALYSIS
FDA revises its playbook for generic peptide products
Seventeen revised draft product-specific guidances explain the evidence FDA expects for certain generic peptide applications.
Retatrutide clears two more Phase 3 readouts—but remains investigational
Lilly reported positive topline TRIUMPH-2 and TRIUMPH-3 results. The data are important, but they are not an FDA approval.
FDA clarifies compounded GLP-1 policy after supply stabilizes
The agency restated the legal boundary between limited compounding exceptions and routine copies of approved GLP-1 medicines.
RECENT RECORD UPDATES
Evidence matrix 2026.08.08 released
Added stable source IDs and original URLs to the matrix export, plus a normalized source-library export.
Source library published
Added a page for every source, showing exactly which peptide records cite it.
Epitalon and DSIP enforcement link corrected
Replaced a retired FDA mirror URL with the live U.S. Department of Justice record and corrected the publisher classification.
BROWSE BY GOAL
Start with what you want to understand.
01
Weight & Metabolism
Approved medicines and the investigational ones behind them
02Recovery
What the healing claims are actually based on
03Growth Hormone
Peptides that raise growth hormone, and what that does and doesn't mean
04Longevity
Aging research, minus the anti-aging promises
05Cognition
Nootropic peptides and where the evidence stops
06Immune / Inflammation
Immunity claims, graded
POPULAR COMPARISONS
Deciding between two peptides?
ASK, WITH SOURCES
Ask a peptide question. Check the sources.
ABOUT
Why PeptideAgent exists
Peptide research is scattered — buried in journal papers, filtered through vendor marketing, or passed around forums as anecdote. PeptideAgent was built to close that gap: every published page is organized from primary sources, verified, and owned by PeptideAgent from first draft to every update.