Explain about the Macro Minerals?

Previously we learnt about the structure, properties, deficiencies/toxicity and recommended dietary intakes of several vitamins. In this unit, we shall brief ourselves about several minerals. As we all know, humans require several mineral elements for optimal functioning. These mineral elements are broadly divided into two classes i.e. macro and micro minerals. Macro minerals, also referred to as major minerals are distinguished from micro minerals by their occurrence in the body. Thus, macro minerals constitute at least 0.01% of the total body weight or occur in minimum quantity of 5 g in a 60 kg body. They are required in amounts greater than 100 mg per day. On the other hand, requirement of micro minerals varies from a few milligrams to micrograms per day.

Objectives

After studying this unit you will be able to:

• Discuss the importance of minerals,
• Describe the metabolism, functions, food sources of all the essential macro minerals,
• Identify the various deficiency and toxicity symptoms of selected macro minerals,
• Explain the significance of interactions among the minerals, and
• Identify the dietary requirements of various macro minerals for different age groups.