PubMed vs Google Scholar: Which Should You Use?

PubMed is a curated biomedical database built on controlled vocabulary and structured search; Google Scholar is a broad academic search engine that crawls scholarly content from many sources. Use PubMed for systematic, reproducible biomedical searching and Google Scholar as a complement, for example to find full text, grey literature and citing articles.

Comparison

When to use each

• Systematic or reproducible searches: PubMed (plus other databases such as Embase). Google Scholar should not be the only source for a systematic review.
• Quick orientation, finding a known paper, forward citation searching, grey literature: Google Scholar.
• Finding free full text: both; also check PMC.

Illustrative example

Invented for teaching. A student drafting a narrative review uses PubMed to build a structured search and screens results. She then uses Google Scholar to check who cited three key papers and finds a recent preprint. She records both searches and states that Scholar was used as a supplementary source.

Combining both in one project

A common, sensible workflow is: build and record a structured PubMed search; add further databases suited to the topic; use Google Scholar for citation chasing and to check that no obvious papers were missed; and report each source, date and method. If a paper appears only in Scholar, check why it was missed in PubMed (non-indexed journal, different terms, preprint) because that may reveal a gap in your PubMed strategy or a source quality issue.

Common pitfalls

• Treating the first 100 Google Scholar results as a systematic search.
• Not noting the date of a Scholar search, as results change.

Key takeaways

• PubMed for structure and reproducibility; Scholar for breadth and citation chasing.
• Report which sources you used and how.

This page is general educational information about research methods. It is not medical, legal or regulatory advice; follow your institution's ethics board and your target journal's instructions.