Nutritional deficiencies

Many diseases in humans are directly or indirectly caused by improper eating habits and malnutrition. These include, but are not limited to, nutritional deficiency diseases, caused by a lack of essential nutrients. These can be associated with poor cognitive performance and other symptoms of interest to psychologists

Additionally, some mental disorders are directly or indirectly linked to nutritional deficiencies]]. These include:-


 * Alcoholic psychosis
 * Alcoholism
 * Anorexia nervosa

Metabolic disorders
Metabolic or nutritionally related disease such as diabetes mellitus or endemic goiter

Vitamins

 * Vitamin poisoning

Refers to a condition of overly high storage levels of vitamins, which can lead to toxic symptoms. The medical names of the different conditions are derived from the vitamin involved: an excess of vitamin A, for example, is called "hypervitaminosis A".

Microminerals and macrominerals
Iron overload disorders are diseases caused by the overaccumulation of iron in the body. Organs commonly affected are the liver, heart and endocrine glands.[1]
 * Iron overload disorder

Proteins/fats/carbohydrates

 * Protein deficiency disorders
 * Protein-energy malnutrition
 * Kwashiorkor
 * Marasmus
 * Mental retardation

Mineral deficiencies

 * Calcium
 * Osteoporosis
 * Rickets
 * Iodine deficiency
 * Iron deficiency
 * Iron deficiency anemia
 * Zinc
 * Growth retardation

Vitamin deficiency disorders]]

 * Vitamin B1, Thiamine
 * Beriberi
 * Vitamin B3, Niacin
 * Pellagra
 * Vitamin C
 * Scurvy
 * Vitamin D
 * Osteoporosis
 * Rickets