Costco Rotisserie Chicken Warning After Lawsuit and Health App Claims

Costco’s $4.99 rotisserie chicken has long been a symbol of unbeatable value, a go-to dinner shortcut for millions of Americans. Now, a trending health app and a newly filed lawsuit are putting that reputation under a microscope, raising questions about what’s really behind one of the most popular items in grocery retail.

The controversy picked up steam after Oasis, a health-focused app, claimed Costco’s rotisserie chicken contains more than a dozen additives despite being marketed as having...