True. A deficiency in certain minerals and compounds in the body can cause sickness or even worst death. Often times, this happens when people are hunger stricken and food is not an available resource. As a result, the necessary nutrients that the body needs for its many processes are not absorbed by the body. This leads to failures in different organ systems and eventually death. A deficiency in iron would lead to a disease called Anemia, and it is one of the many diseases that affect individuals who lack nutrients in their blood to transport oxygen through the body.