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What is Vitamin A deficiency causes all of the following EXCEPT:- and explain in detail?
Night blindness (nyctalopia) is one of the earliest symptoms of vitamin A deﬁciency.
Vitamin A deﬁciency results in growth retardation due to impairment in skeletal formation.
The reproductive system is adversely aﬀected in vitamin A deﬁciency. Degeneration of germinal  epithelium leads to sterility in males. 
Excessive consumption of vitamin A leads to toxicity. 
The  symptoms of hypervitaminosis A include dermatitis (drying and redness of skin), enlargement of liver, skeletal decalciﬁcation, tenderness of long bones, loss of weight, irritability, loss of hair, joint  pains etc.

Key Concept:
Vitamin A deﬁciency causes growth retardation due to impairment in skeletal formation,degeneration of germinal epithelium leading to sterility in male and nyctalopia
Reference: Satyanarayana- Biochemistry, 3rd edition, pg-123