Minerals

Calcium

In plain language

Essential for bone strength. Most useful alongside vitamin D, especially for older adults at risk of bone loss.

Is it an approved medication?

No — not an approved medication

No - sold as a food/OTC supplement, not a prescription medication

How strong is the evidence?

Moderate, strongest when combined with vitamin D in older women

The main thing to know

High-dose supplements (versus food sources) have been debated for a possible heart-health downside - don't over-supplement.

Mechanism

Structural component of bone mineral matrix; also essential for muscle contraction, nerve signaling, and blood clotting.

Potential benefits

Bone density maintenance and fracture risk reduction, particularly combined with vitamin D in postmenopausal women

Regulatory status

Dietary supplement, widely approved