You will need a student membership to the Academy to access the full version of the Evidence Analysis Library.
Choose "Cochrane Databases" and then "Cochrane Database of Systematic Reviews" on the SPU Library's databases page.
Contact me if you need help accessing or using these tools.
You may want to include statistics in your introduction. For example, if your experimental food is aimed toward diabetics, you would want to include some statistics on how many people are diagnosed with diabetes, how many hospital visits are by people diagnosed with diabetes and how many people die each year from diabetes, etc.
National Center for Health Statistics: http://www.cdc.gov/nchs/
World Health Organization Data & Statistics: http://www.who.int/healthinfo/statistics/en/
Environmental Protection Agency: http://epa.gov/
Food and Drug Administration: http://www.fda.gov/