A disease or syndrome that is known as an avitaminosis or hypovitaminosis can be brought on by a lack of a particular vitamin. In most cases, this refers to a chronic lack of a particular vitamin in the body. It is possible to classify it as a primary deficiency when it is brought on by insufficient nutrition, and it is possible to classify it as a secondary deficiency when it is brought on by an underlying disorder such as malabsorption. An underlying metabolic disorder could be the cause, such as a problem with the conversion of tryptophan to niacin. Choices in lifestyle, such as smoking and drinking alcohol, can also play a role in the development of this condition.
Examples are: vitamin A deficiency, folate deficiency, scurvy, vitamin D deficiency, vitamin E deficiency, and vitamin K deficiency.