Vitamin deficiency : The first disease to be directly linked to a vitamin deficiency was scurvy . Scurvy is characterized by general malaise and lethargy, progressing on to spotty skin, losing teeth, and bleeding and swollen gums. Slow wound healing and general weakness is also a regular symptom. If left untreated scurvy can be fatal.

Mineral deficiency : Mineral deficiency is a lack of dietary minerals, the micronutrients that are needed for an organism's proper health. The cause may be a poor diet, impaired uptake of the minerals that are consumed or a dysfunction in the organism's use of the mineral after it is absorbed.

Body Decay : In order to understand how body farms work, it helps to know some basics about human death and decay. Though it sounds pretty macabre, it's perfectly normal for your body to go through some radical changes when you die. To begin with, when your heart stops beating, your body's cells and tissues stop receiving oxygen.

Obesity : Obesity means having too much body fat. It is different from being overweight, which means weighing too much. The weight may come from muscle, bone, fat, and/or body water. Both terms mean that a person's weight is greater than what's considered healthy for his or her height.