Calcium, Natural

Also known as: calcium carbonate, calcium citrate, calcium phosphate, coral calcium

Most abundant mineral in the body, essential for bone health, muscle contraction, nerve signaling, and blood clotting. Absorption decreases with age.

1000mgRDARecommended Dietary Allowance — the daily intake sufficient for 97-98% of healthy adults. Set by the National Institutes of Health.

2500mgUpper LimitTolerable Upper Intake Level (UL) — the maximum daily dose unlikely to cause adverse health effects. Exceeding this consistently may increase toxicity risk.

3ProductsNumber of supplements in our database that contain this ingredient.

2Health ClaimsNumber of researched health benefits associated with this ingredient, rated by evidence strength (strong/moderate/weak).

4Side EffectsNumber of documented side effects from clinical literature and adverse event reports.

Health Claims & Evidence

strongSupports bone health

Primary structural component of bones. Adequate lifelong intake, combined with vitamin D, helps prevent osteoporosis — supported by extensive clinical evidence.

0 studies on PubMed

strongSupports muscle function

Essential for muscle contraction through calcium signaling.

0 studies on PubMed

Known Side Effects

constipation
bloating
kidney stones with excess intake
possible cardiovascular risk at high doses

Drug Interactions

tetracycline antibiotics
bisphosphonates
thyroid medications
iron supplements

Always consult your healthcare provider before combining supplements with medications.

Products Containing Calcium, Natural (3)

Garden of Life Vitamin CodeVitamin Code Grow Bone Calcium

90 2

Garden of LifeRaw Organic Fit Vanilla Flavor

77 3

Maxi HealthMaxi Whey Protein