Fatigue is a feeling of tiredness or exhaustion or a need to rest because of lack of energy or strength. It is not a disease, much more related to symptoms where an individual has overworked his own body's capabilities. It may result from overwork, poor sleeping routine, worry, boredom, or even lack of exercise. It is also a symptom that may be caused by illness, medicine, or medical treatment. Individuals who experienced these symptoms are encouraged to consume products which are able to boost up and sustain the energy levels of the body.