Calcium is a mineral your body uses constantly to build, move, send signals, and keep your heart and blood working smoothly.

What calcium does in the body

  • Builds and maintains strong bones and teeth; about 99% of your body’s calcium is stored there for structure and hardness.
  • Helps muscles contract and relax, including your heart muscle so it can keep a steady rhythm.
  • Allows nerves to send messages between your brain and the rest of your body (it’s crucial for normal nerve signaling).
  • Supports blood clotting, so you stop bleeding properly after cuts or injuries.
  • Helps many enzymes work, and assists in releasing hormones and other chemical messengers that control body functions.
  • Helps blood vessels tighten and relax, which affects healthy blood flow and blood pressure control.

Why steady calcium intake matters

Your body keeps blood calcium in a very tight range, even if your diet is low in calcium. When you don’t get enough over time, your body pulls calcium out of your bones to keep blood levels normal, which can weaken bones and raise the risk of osteoporosis and fractures later in life.

Everyday example

Every time you walk upstairs, your leg muscles use calcium to contract, your nerves use calcium to fire signals that coordinate each step, and your heart uses calcium to beat regularly—while your skeleton quietly acts as both your support frame and calcium “bank.”

Information gathered from public forums or data available on the internet and portrayed here.