What is constant unexplained fatigue a symptom of?
It is usually a symptom of depression, a vitamin deficiency, lack of iron, low grade infection, or a possible immune deficiency problems, possible poor intestinal health caused by high sugar, high starch diet, ulcers in the colon caused by poor digestion, and breakdown of food eaten, (not absorbing nutrients, that causes alot of fatique.. chronic fatique syndrome). . it would be a good idea to have a CBC (complete blood count) to see what might be going on..