What Could Cause Fatigue? 15 Possible Triggers (List)

Under-Eating 

Constant fatigue is one of the most evident and common symptoms that can occur when a person is not consuming enough food. The calories taken into a person’s body through their diet provide the source of their body’s energy. The body, to function effectively, requires a predetermined quantity of energy calories. The term “function” refers to the fundamental and automatic activities that occur within the body, such as breathing, and more complicated functions, such as actively thinking. The number of calories an individual needs to consume daily to keep a healthy weight will depend on the individual. It will be determined by many different aspects, such as the size of the body, the individual’s metabolism, and the time spent engaging in physical activities. 

When someone is undereating, they take fewer calories than their body requires to perform at its optimal level. As a result, it can significantly affect a person’s energy level, leading to physical and mental exhaustion and making it difficult for them to carry out their regular activities.