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Mineral · in-depth review

Calcium Citrate

Calcium Citrate

Helps replenish calcium while remaining easier on the gut, and suits people who need flexible dosing times.

Also known asCa

More water-soluble calcium salt

Helps replenish calcium while remaining easier on the gut, and suits people who need flexible dosing times.

Ingredient characteristic: Established

Maintains bones and teeth

Calcium and vitamin D together support bone mineralization and bone structure.

Nutrition consensus: Established

Supports muscle and nerve function

Calcium is involved in muscle contraction, nerve conduction, and blood-vessel function.

Mechanism: Established
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With foodTake calcium carbonate with food; calcium citrate can be taken with or without food
Best timeTwo divided doses are usually better absorbed

Can be taken with or without food, in split doses.

General wellnessAdults 19–50: 1,000 mg elemental calcium/day; women 51 and older and all adults 71 and older: 1,200 mg/day
Specific needsOsteoporosis or deficiency treatment doses must be set by a doctor using diet, vitamin D, and bone testing.

How oftenPrefer food first and make up any gap from the product label; the usual adult total upper limit is 2,500–2,000 mg/day, depending on age.

Cautions

Forms are not interchangeable by name alone; check the label, units, and total intake first.

People with kidney stones, high blood calcium, kidney disease, or parathyroid disease should ask a doctor first.

Take calcium supplements apart from iron, levothyroxine, and some antibiotics.

Common side effects

· Constipation

· Stomach discomfort

Rare but important

· Long-term excess may raise the risk of high blood calcium or kidney stones.

Long-term dependenceNot addictive; long-term excess may cause mineral imbalance or kidney stones.

Medical disclaimerThis page is compiled by the HerbBB editorial team for general health information only. It is not a substitute for advice from a doctor, pharmacist, or other qualified clinician. If you have a health condition, take medicines, or are pregnant or breastfeeding, speak with a professional first.