Human beings need calcium because it plays several essential roles in the body. Calcium is crucial for building and maintaining strong bones and teeth, as about 99% of the body's calcium is stored in these structures. It also supports vital functions such as blood clotting, muscle contraction, nerve signal transmission, hormone release, and maintaining a normal heartbeat. Without adequate calcium, bones can weaken, leading to conditions like osteoporosis, and other bodily functions can be impaired.
Key Functions of Calcium
- Bone and Teeth Health: Calcium forms the structural component of bones and teeth, giving them strength and rigidity. Maintaining adequate calcium throughout life helps prevent bone density loss and fractures.
- Muscle Function: Calcium is involved in muscle contraction and relaxation by facilitating interaction of muscle proteins when nerves stimulate muscles.
- Nerve Signaling: Calcium triggers the release of neurotransmitters necessary for nerve communication throughout the body.
- Blood Clotting: Calcium activates platelets which help in blood clot formation to prevent excessive bleeding.
- Heart Health: It helps regulate normal heart rhythms and blood pressure.
Calcium Balance and Regulation
The body carefully regulates calcium levels in the blood, bones, and tissues mainly via hormones like parathyroid hormone and calcitonin. When blood calcium is low, calcium is released from bones to maintain necessary functions, while adequate dietary calcium intake helps replenish bone stores.
In summary, calcium is indispensable for structural, muscular, neural, and circulatory health, making it a vital mineral for human beings.
