Everything you need for
peptide research, in one place
Prof. Peptide is an independent research library covering 64 peptide profiles, 52 vendor reviews, price comparisons across all vendors, and verified discount codes.
Plus a precision dosage calculator and an all-in-one protocol tracker app.
64
Peptide profiles
69
Compounds compared
52
Verified discount codes
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Independent research
Prof. Peptide provides peptide research for educational purposes only. Nothing on this site constitutes medical advice or endorses human use of research peptides.
Latest News
View all newsAugust 29, 2026
Lilly Sues Six Retatrutide Sellers — and the Legal Architecture Is the Story
Eli Lilly filed six federal lawsuits on August 12, 2026 over retatrutide sales — four research-use-only peptide sellers, a med spa, and a compounding pharmacy. The filings are allegations and nothing has been decided, but the pleading choices are instructive: no patent counts, no FDCA counts, and eight states’ unfair-competition and consumer-protection statutes instead, plus one Lanham Act claim. Why that architecture, what it says about the limits of an “research use only” label, and why an investigational molecule with no shortage pathway makes these suits different in kind from the 2024–25 compounding fights.
Read more →Everything a researcher needs
From peptide mechanisms to reconstitution math — Prof. Peptide covers it all, clearly and credibly.
Peptide Library
Comprehensive profiles on 64 research peptides — mechanisms, half-lives, stacking protocols, and more.
Browse library →Bioregulator Guide
A research guide to the Khavinson short-peptide bioregulators — the gene-regulation hypothesis, synthetic analogs vs. organ extracts, and the individual compounds.
Read the guide →Comparisons
Side-by-side breakdowns of popular peptides and supplements — mechanisms, evidence, dosing, and how to choose between them.
Compare compounds →Featured Vendors
Our vetted alphabetical list of research peptide suppliers — with third-party testing, published COAs, and the quality criteria we use to include them.
See vetted vendors →Prices
Compare research-peptide prices across 52 vendors — normalized to $/mg by vial size, post-code, and sorted lowest-first.
Compare prices →Coupon Codes
Verified discount codes for research-grade suppliers. Updated regularly.
See codes →Peptide Reconstitution & Dosage Calculator
Accurately reconstitute and dose any peptide with our step-by-step research calculator.
Open calculator →Get the App
The all-in-one peptide tracker for iPhone — log doses, see estimated levels, run protocols, and search 60+ peptides by name or brand.
Download →News
The latest peptide research news, regulatory updates, and developments.
View news →Built for researchers
Most peptide sites exist to sell products. Prof. Peptide exists to educate. We're independent, ad-light, and committed to presenting research accurately — including limitations and unknowns.
- ✓Content is editorially independent and research-driven
- ✓Every peptide profile cites primary research literature
- ✓Calculator math is transparent and peer-reviewable
- ✓Discount codes are manually verified before publishing
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Log doses, see estimated levels, calculate reconstitution, and search 60+ peptides by name or brand — all in one private iOS app.
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