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Gerstein Science Information Centre

Nutritional Sciences Resources

What Is Grey Literature?

Grey Literature is any literature that has not been published through traditional, Western, and/or colonial channels. It is often excluded from large databases and other mainstream sources. Grey literature and works can also mean literature that is hard to find or has inconsistent or missing bibliographic information. 

Search grey literature to:

  • avoid bias
  • ensure that your review is as thorough as possible
  • find sources for negative results or brand new evidence; often, studies with negative or null results do not get published in prominent journals, so it is useful to check grey literature
  • discover more references to published literature that your database search might have missed

Visit our LibGuide about Grey Lit for more in-depth information and lists of places to find additional theses and dissertations, conference proceedings, institutional repositories, government documents, clinical trial databases, and more.

Government and Organization Documents

Government bodies frequently publish reports and studies on topics relevant to health science. Government bodies at various levels produce relevant materials.


Statistics and Data

Negative Results