Macro-minerals are nutrients. Minerals help the body perform numerous functions, such as building strong bones, transmitting nerve impulses, making hormones and maintaining a regular heartbeat.
Macro-minerals are the major minerals in animal nutrition (as distinct from trace minerals[micro-minerals]). Minerals are essential for body functioning and structure. They help to build body tissues (e.g. bone) or to regulate metabolic activities.
Dr. Linus Pauling, the only person in history who was awarded two unshared Nobel Prizes wrote this of minerals:
You can trace every sickness, every disease and every ailment to a mineral deficiency.
The total mineral content of the body is approximately 4 percent of body weight. Macrominerals are present in the body in relatively larger amounts than micro minerals (thus the name). Calcium makes up approximately 1.75 percent of total body weight, phosphorus makes up approximately 1.10 percent of total body weight, and magnesium makes up approximately .04 percent of total body weight.