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Calcium
(Citrate)

Strong study situation·10/10
A higher score indicates better study conditions, but not necessarily effectiveness.

A highly bioavailable calcium supplement for bone health, especially suited for those with absorption issues or low dietary intake.

dose range
1000–1200 mg
Split total daily dose into 2–3 servings of 500–600 mg elemental calcium each.
Consumption
Can be taken with or without food (unlike calcium carbonate); best absorbed when spread across the day.
Not fat-soluble.
Best time
Divided dosing improves absorption and may reduce gastrointestinal side effects.
Description

Calcium citrate is a readily absorbed form of calcium used to support bone health and prevent deficiency, particularly where gastric acid production is low or dietary intake is inadequate.

benefits
Main effects with level of evidence
Strong
Note on evidence

Calcium’s effects on bone health and utility in deficiency are well substantiated; impacts on cardiovascular and muscle function are supported but less robust.

Supports bone strength and density

Strong

Calcium citrate helps maintain bone mineral density and reduces fracture risk, especially in postmenopausal women and older adults.

Particularly relevant for: Older adults · Postmenopausal women · People with low dietary calcium

Promotes healthy muscle function

Moderate

Adequate calcium is vital for muscle contraction and relaxation, with deficiency increasing risk of cramps and dysfunction.

Particularly relevant for: Active individuals · Older adults

May support healthy blood pressure and vascular function

Limited

Calcium supplementation can modestly lower blood pressure in some individuals with hypertension; long-term effects require more research.

Particularly relevant for: People with hypertension

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This information is for educational purposes only and does not replace medical advice.

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This website is for educational and informational purposes only and does not constitute medical advice or professional services. The information provided should not be used to diagnose or treat any health problem or disease. Persons requiring medical advice should consult a licensed physician.