For your assignment, you will need to find three peer-reviewed scholarly journal articles written within the last five years. These articles should report on a scientific study of humans, or be a review of such studies.

Searching in subject databases will yield a higher proportion of relevant results. You will also have more advanced search tools. For this assignment, the thesaurus or subject heading list is quite useful.
 

The following instructions are for SPORTDiscus, but look for subject headings in other databases. In Medline they are called MeSH, and in CINAHL they are called subject headings.

1. Find the thesaurus in the top bar of SPORTDiscus. 
2. Enter a search term and click browse. 
3. Select the check-box next to your subject term and click "Add". You can also explore subjects by clicking directly on the text- it will show you if there are broader, narrower, and related terms.
4. Your subject term will appear in the top search bar. To add keywords, first type AND in caps, and click Search.

These are great sources of background information.  These sources provide clear, reliable information on nutrients that can help you focus your search and generate keywords. These resources do not contain scholarly journal articles.

Search the journal-title online

Do a Google search for the name of the journal, and then find out the process for accepting articles.  If it's peer-reviewed, articles will have to be reviewed and approved by one or more peers (ie other experts in the field)  before being published.

Check the About page, Aims and Scope, Mission Statement, or Author Guidelines / Submission Process to find out more about the journal's peer-review process.