How to read a source type
Every cited link in this index carries one of 10 source-type labels. Below they run from most to least formal, with how many of the 693 cited pages carry each label and example websites from the index.
Regulators and official labels
- Regulator 64 cited pages
Government health agencies, drug regulators and official government publications.
Example websites: accessdata.fda.gov, fda.gov, dailymed.nlm.nih.gov, ods.od.nih.gov, scottishmedicines.org.uk
- Official label 10 cited pages
Prescribing information, product labels and official announcements from the company that makes the product, including press releases.
Example websites: globenewswire.com, investor.lilly.com, novonordisk-us.com, carnitor.com, egriftawr.com
Research and registries
- Research 245 cited pages
Journal articles, conference abstracts, preprints, literature databases and research-summary services. Not all of these are peer-reviewed. Preprints and abstracts usually are not.
Example websites: pmc.ncbi.nlm.nih.gov, pubmed.ncbi.nlm.nih.gov, link.springer.com, academic.oup.com, nejm.org
- Trial registry 10 cited pages
Clinical trial registries. A registry entry shows that a trial was planned or run; it may not include results.
Example websites: clinicaltrials.gov, clinicaltrialsregister.eu, trialscreen.org
Explainers, news and reference
- Reference 21 cited pages
Drug references, encyclopedias and professional education websites.
Example websites: en.wikipedia.org, unboundmedicine.com, cartilageguide.com, empiremedicaltraining.com, healthprofessionalacademy.co.uk
- News 9 cited pages
News and magazine outlets.
Example websites: biospace.com, gq.com, healio.com, inkl.com, peptidenewsdigest.org
- Explainer 132 cited pages
Consumer-facing websites, guides, wikis, blogs and apps that explain peptides in general terms. Quality varies widely. Many are not written by clinicians, and some may have commercial ties.
Example websites: pepedhub.com, exa.ai, draxe.com, seekpeptides.com, thinksteroids.com
Community, vendor and clinic pages
- Clinic 17 cited pages
Telehealth services, clinics and compounding pharmacies. These are businesses that may prescribe or sell the compounds discussed.
Example websites: drsobo.com, empowersleep.com, flowwellness.com, formulavpharmaceuticals.com, healthrx.com
- Vendor 47 cited pages
Businesses that sell the compound or a product containing it, including sellers of products labelled "research use only."
Example websites: formblends.com, greypeptides.com, ajmc.com, bergdorfbio.com, purehealthpeptides.com
- Community 138 cited pages
Reddit, forums and other online communities. These are unverified personal reports.
Example websites: reddit.com, excelmale.com, glp1forum.com, looksmax.org
Labels describe the website, not the individual page. They are assigned from a list of known websites we maintain, and a website not on that list is labelled by an automatic rule that treats unrecognized websites as vendors, so a label can be wrong.
A citation is not an endorsement. Vendor, clinic and community pages are cited only where a claim, an ingredient list or a user experience was first published, and labelling them shows what a statement rests on. Do not treat them as places to buy. The Site has no advertising or affiliate links.
See the methodology for how labels are assigned and the full source list.