Which of the following is NOT a symptom of foodborne illness?

Excessive energy is not a symptom of foodborne illness. When individuals suffer from foodborne illnesses, they typically experience a range of symptoms that reflect their body's response to pathogens present in contaminated food. Common symptoms include fever, abdominal pain, and nausea, which are signs of the body's inflammatory response as it fights off infection and responds to toxins.

In contrast, excessive energy would be an uncharacteristic experience for someone who is unwell due to foodborne illness. Instead, individuals generally feel fatigued, weak, or lethargic as their body deals with the stress of illness, which is why this option stands out as not being associated with foodborne illness symptoms.