Food Safety Report: H-E-B, Thousand Oaks Drive, San Antonio, TX, USA 9 months ago • details 34 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Stomach Pain, Cramps, Chills, Headache Suspected source: Duncan Hines keto icing Onset: 1 to 2 days Duration: 12 to 24 hours