Use of mineral matter in body:

1. Form bone.

2. Essential part of protoplasm.

3. Necessary for body fluids, etc.

An average man excretes between twenty and thirty grams of mineral matter per day. This amount must be supplied to the body by food and beverages. The only mineral matter which is added directly to our food is common salt, sodium chloride (NaCl), all the others required being found in sufficient quantity in a well-balanced dietary. We probably consume much more common salt than is needed by the body, but it has a decided value as a condiment, improving the flavor of foods and hence making them digest more easily. . Mineral matter, as a rule, is found abundantly in fresh fruits and vegetables.

Two of the most important minerals required by the body are lime (calcium, Ca) and iron (Fe). The other minerals are also of much importance, but are usually supplied by our foods in sufficient quantity for the needs of the body.