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Vitamin deficiency
? TBD
Medical condition
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Wikipedia

Vitamin deficiency is the condition of a long-term lack of a vitamin. When caused by not enough vitamin intake it is classified as a primary deficiency, whereas when due to an underlying disorder such as malabsorption it is called a secondary deficiency. An underlying disorder can have 2 main causes:

Instance of
laboratory finding
Subclass of
List of types of malnutrition
References
Wikidata