What calcium does
Calcium supports bone and tooth structure, muscle contraction, nerve signaling, and blood clotting.
Common dose ranges
General reference intakes for most adults are around 1,000 mg/day (often 1,200 mg/day for older adults and postmenopausal women), with widely cited upper limits near 2,000–2,500 mg/day from all sources.
Where it shows up in your day
- Dairy: milk, yogurt, cheese
- Fortified plant milks and orange juice
- Tofu set with calcium, sardines with bones
- Leafy greens such as kale and bok choy
- Calcium-containing antacids (e.g., Tums)
When VitaCheck may flag it
If your diet already supplies meaningful calcium and you take a stand-alone calcium plus a multivitamin plus an antacid, totals may push past sensible upper limits. We mark it “review with a clinician” rather than telling you to stop.
Frequently asked questions
Do I need a calcium supplement?
It depends on your diet. People who regularly eat dairy, fortified plant milks, tofu set with calcium, or leafy greens often meet calcium needs through food. Supplementation may be more relevant in postmenopausal women or strict diets that avoid these foods.
Can I take too much calcium?
Yes. Widely cited upper limits for adults sit around 2,000–2,500 mg/day from all sources combined. Excess intake may be linked to kidney stones and other concerns, so totaling diet plus supplements matters.
Does calcium affect other supplements?
Calcium can reduce absorption of iron, zinc, magnesium, and some medications when taken at the same time. Spacing doses by a few hours can help. Confirm specifics with a pharmacist.