Taste serves as a crucial sensory function, akin to smell, acting as a gatekeeper for what we consume. It helps our body evaluate the safety of food by detecting potentially harmful flavors, such as bitterness or sourness, and identifying nutritious elements that are often salty or sweet. This chemical assessment is essential for protecting the digestive system.

In Mary Roach's "Gulp: Adventures on the Alimentary Canal," she delves into the intricate processes behind our eating habits. The exploration of taste reveals its role not only in enjoyment but also in our survival, guiding our choices towards safe and beneficial foods while steering us away from those that might be harmful.