Sources and citations
Updated Oct 16, 2026 · Applies to Web, iPhone, and Android · All plans
Answers cite their sources with a small number at the end of a sentence. Select it to see the sources behind that sentence, and open the full list of an answer's sources from the Sources button beneath it.
Read a citation
On the web
- Select the number at the end of a sentence. The answer's sources open in a panel, numbered, with the sources behind that sentence highlighted.
- Each source shows where it is published, its title, and the authors and year. Select one to open it in a new tab.
On iPhone and on Android
Tap the number at the end of a sentence. The Sources sheet opens with the sources behind that sentence highlighted. Tap a source to open it in the in-app browser.
See every source for an answer
On the web
- Wait for the answer to finish.
- Select Sources under the answer. The button shows how many sources the answer used.
- A panel opens beside the conversation and lists each source with where it is published, its authors and year. It stays open while you scroll, and you can close it with the X at its top. Select a source to open it.
On iPhone and on Android
- Under the answer, tap the book button with the number of sources.
- The Sources sheet lists each one. Tap a source to open it.
What ChatPEP cites
- Published studies, linked on PubMed or by their DOI.
- Registered clinical trials, linked on ClinicalTrials.gov.
- Web pages, linked by their address.
Sources and your plan
Every plan cites its sources. What an answer can draw on grows with the plan:
- Every plan: ChatPEP's library of peptide research, and current sources from the web.
- Research: also reviews published scientific papers, and reads the full pages behind web results.
- Frontier: reviews more papers and more web results for each answer.
See Compare plans.
Ask about a specific page
Paste a link to an article or a study into your message and ask about it. ChatPEP reads the page and can cite it in the answer. This works on every plan.
Not every sentence has a citation
Definitions, general explanations, and follow-ups on something already cited may have none. To see the evidence behind a claim, ask for it: "Which studies show that?"
Check what matters
ChatPEP can make mistakes, including citing a source that does not fully support a claim. For anything important, open the source and read it. If a citation is wrong, rate the answer with a thumbs down, or report it. See Rate an answer.
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Related articles
- How to read an answerThe warnings, cards, citations, and buttons that make up an answer, and what each one tells you.
- Rate an answerRate an answer with a thumbs up or down, or report one that is inaccurate, harmful, or misleading, and what happens next.
- Compare plansWhat Free, Basic, Research, and Frontier each include, from daily messages to research depth, and what every plan shares.
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