Calcium

It is necessary for the development of strong bones and sound teeth, normal blood clotting and prevention of rickets; it regulates activity of muscles and nerves.

A person deficient in calcium has the following symptoms:

1. The growth of a person is stunted.

2. There is defective structure of teeth and bones called rickets in infants and children.

3. There is softening of bones in adults.

4. There is tetany in very low blood calcium.

Vitamin A

It is necessary to new cell growth. It helps fight infection. It is essential for the healthy skin, good blood, strong bones and teeth, kidneys,bladder,lungs and membranes.It seems to help delay senility and extended longevity.

Symptomes of Vitamin A Deficiency:

* Deficiency in Vitamin A,could be noted in skin and eyes of a person beside retarding his growth and giving him low resistance to diseases.

* A person deficient in Vitamin A,could be detected through the dryness of his skin,scaly skin,and the pre-mature wrinkling of the skin.

* Deficiency of Vitamin A,affects the eyes of a person in the following ways:

a.Inability to see in dim light

b.Eyes sensitive to bright light

c.Severe blindness deficiency