Food Safety Report: sweetgreen, Walnut Street, Philadelphia, PA, USA 1 year ago • details 578 Comments Comment Suspected food poisoning. Symptoms: Nausea, Vomiting, Headache Suspected source: Sweetgreen shroomami salad Onset: 4 to 12 hours Duration: 4 to 12 hours Sick: Me Additional information: It was the only thing I ate today