Mineral guide
Calcium
Calcium is the major mineral in bones and teeth. Supplements can help when diet is insufficient, but more calcium is not always better and should be considered alongside D status, K2 context, magnesium, protein, and strength training.
Strong for deficiencyBone and teeth structureMuscle contractionNerve signaling
Supports
- Bone and teeth structure
- Muscle contraction
- Nerve signaling
- Blood clotting
Best for
- Low dietary calcium intake
- Bone-health routines
- Women after 30 and older adults when intake is inadequate
Cautions
- Kidney stones, kidney disease, high calcium, and some heart-risk contexts need clinician guidance.
- Separate calcium from iron, thyroid medication, and certain antibiotics.
Food Sources
Milk
Curd/yogurt
Cheese
Calcium-set tofu
Sardines with bones
Fortified foods
Leafy greens
Supplement Forms
Calcium carbonate
Calcium citrate
Calcium malate
Calcium hydroxyapatite
Timing
Split larger doses. Calcium carbonate is best with food; calcium citrate is less meal-dependent.
Interactions To Check
Iron
Levothyroxine
Some antibiotics
Bisphosphonates
FAQs
Is calcium enough for bones?
No. Vitamin D, protein, strength training, magnesium, age, hormones, and total diet all matter.
Which calcium form is gentler?
Calcium citrate is often easier to take without food and may be preferred in some digestion contexts; calcium carbonate is common and should be taken with meals.