Minerals are inorganic substances like sodium, potassium, calcium, phosphorus, iodine, iron, cobalt, etc. They play an essential role in maintaining health but they do not supply energy. The recent understanding of the role of fluid and electrolyte in the human body has been overshadowed by other developments in medical science without realizing that changes in blood concentration of important minerals may endanger life. One of the most important factors that have improved the outcome of surgical patients in recent times is due to better physiological management of fluid-electrolyte balance. On the other hand, over-enthusiastic fluid-electrolyte correction particularly in the elderly has overloaded patients with fluids which can often be dangerous. So, we need to have minerals within a range of our physiological requirements. Now, we will discuss the role of minerals which have a significant role in human physiology but are unknown to most laymen.
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