Nutrient Depletion can be a serious condition in which the body is lacking certain nutrients to function optimally. To ensure that the Human Body runs at peak performance, which means repairing muscle tissue and to fight off infections, it needs to take in life sustaining nutrients. These are essential nutrients, which are nutrients that your body can't make on its own. The nutrients known to be essential for human beings are proteins, carbohydrates, fats and oils, minerals, vitamins, and water.