Question

what are deficiency diseases ???​

Answer 1

Answer:

a disease caused by the lack of an element in the diet, usually a particular vitamin or mineral.

Explanation:

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Answer 2

Deficiency (medicine), including various types of malnutrition, as well as genetic diseases caused by deficiencies of endogenously produced proteins. A deficiency in construction, an item, or condition that is considered sub-standard, or below minimum expectations.