True. Hands are indeed one of the most common ways food handlers can contaminate food and food contact surfaces. Food handlers' hands can carry various types of bacteria, viruses, and other pathogens that can be transferred to food during handling. Failure to properly wash hands or practicing poor hand hygiene, such as not washing hands after using the restroom or touching surfaces that may be contaminated, can introduce harmful microorganisms to the food. Therefore, proper handwashing and hygiene practices are essential for preventing the spread of contamination and maintaining food safety.