a) Iron
Iron Deficiency Anemia
b) Iodine
Goiter
c) Fluoride
May cause increased dental caries and possibly osteoporosis
d) Vitamin A
Vitamin A is essential for night vision and improves effectiveness of the immune system. Its deficiency also causes retarded growth, Night blindness and susceptibility to infection. It can be found in many dairy products, and especially in carrots.
e) Vitamin D
Essential part of the diet required in the absorption of minerals in food, where a lack of vitamin D in the diet leads to a condition called rickets, where softening of the bones cause them to bend from the lack of calcium. Its deficiency also causes osteomalacia in the adults. Humans have the ability to synthesize vitamin D from sunlight.