Minerals are elements that originate in the Earth and cannot be made by living systems. Plants obtain minerals from the soil, and most of the minerals in our diets come directly from plants or indirectly from animal sources. Minerals may also be present in the water we drink, but this varies with geographic locale. Minerals from plant sources may also vary from place to place, because soil mineral content varies geographically too.
For years the supplement market has been dominated by vitamins, but vitamins and amino acids are ineffective without minerals because all enzyme activities involve minerals. Minerals are needed to maintain the delicate cellular fluid balance, to form bone and blood cells, to provide for electrochemical nerve activity, and to regulate muscle tone and activity (including organ muscles like the heart, stomach, liver, etc).