A meal preparation study (PDF, 1.3 MB) from the U.S. Department of Agriculture’s (USDA) Food Safety and Inspection Service (FSIS) revealed that only 55% of people use a food thermometer to verify if their food is safe to consume, despite 88% of participants reporting that they own a thermometer. Instead, participants in the study relied on visual cues such as color, firmness and time. But are visual cues enough to prevent foodborne illness?