plzzzzzzz    explain me deficiency disease in deeeetaiil

• Deficiency Diseases or disorders occur mainly due to the deficiency of one or more nutrients in the diet over a long period of time. For example,
• Night blindness disease is caused due to the deficiency of vitamin A in the diet.
• Beri beri disease is caused due to the deficiency of vitamin-B.
• Anaemia disease is caused due to the deficiency of iron.

Different vitamins & minerals along with their deficiency diseases are mention in table below:-

You can refer to Meritnation study material for more details.