It’s not surprising that nutrient deficiencies are fatigue causes, given that your body’s trillions of cells rely on vitamins and minerals to generate energy. What is surprising is that few doctors recognize the fact that fatigue and lacking energy is often an early symptom of multiple vitamin and mineral deficiencies. Many health care providers also ignore the well-documented fact that lack of vitamins and minerals is a surprisingly common malady. This is true even in the developed world, where we are known as the “overfed but undernourished.”