Wikipedia: Food Allergies
This is a broad topic and the article is extensive. Be sure to click on appropriate links and check out the "ideal sources" suggested on the "talk" tab.
WebMD | MayoClinic.com | Healthline | Sharecare
AltHealthWatch | Consumer Health Complete | Health Source | Medline
For each site you find ask yourself:
Is this a personal blog? a forum?
Who sponsored/authored this site and what professional credentials do they lend to the site?
Is the site selling some product or idea? Does this effect the message (expected bias)?
Library Information and Media Center - Monona Grove High School - Monona, Wisconsin