Home/ Supplements/ Electrolytes/ Coral Calcium 1000 mg

Coral Calcium 1000 mg

product on market Capsule 21st Century Safety: 87/100
87/100

This product is generally safe

  • Magnesium: 500mg is 1.4× the Tolerable Upper Intake Level (350mg)
  • 67% of ingredients have research evidence
C Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · methodology

Calcium and Vitamin D3 have strong evidence for supporting bone density and mineral absorption. Magnesium provides moderate support for muscle and nerve function. Together, these ingredients contribute to skeletal health, though overall evidence coverage for this specific formulation is limited.

AI-generated summary based on research evidence. Not medical advice.

Alerts

Safety Alerts

Magnesium: 500mg is 1.4× the Tolerable Upper Intake Level (350mg)

Label

Product Label

Label for Coral Calcium 1000 mg
Open Full PDF View on NIH DSLD →
Details

Label Data

4 Capsule(s)
Serving Size
30
Servings
Other Combinations
Product Type
67%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

10 mcg (50% DV)
Within RDA (0.7× RDA) 608 studies (A:16, B:251)
Calcium
1000 mg (77% DV)
500 mg (119% DV)
Exceeds UL by 1.4× (UL: 350 mg) 316 studies (A:8, B:159)

Other Ingredients

Gelatin Magnesium Stearate Magnesium Silicate Maltodextrin Cellulose Silicon Dioxide Titanium Dioxide
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Directions: As a calcium supplement, adults take four (4) capsules with any meal or as directed by a healthcare provider. Do not exceed recommended dosage. Individual results may vary.

Warnings & Precautions

Do not exceed recommended dosage.

Warning: Consult a healthcare provider prior to use if pregnant, nursing, on medications, have a medical condition or are planning a medical procedure.

Stop use and contact a physician if adverse reactions occur. Do not use if product appears to be tampered with or seal is broken.

Keep out of reach of children.

Formulation Notes

Coral Calcium has the ideal calcium to magnesium ratio of 2:1 that supports bone health and heart, nerve and muscle function.

No live coral was harmed in the harvesting of 21st Century's Eco-Friendly Coral Calcium.

No added salt, yeast or artificial flavors.

Eco-friendly Coral Calcium 1000 mg per serving Authentic Okinawa Coral Calcium A Balanced Source of Calcium and Magnesium Over 72 Trace Minerals

Gluten free

Additional Information

Store at room temperature.

Guaranteed Quality Laboratory Tested

Metadata

Product Details

UPC / SKU7 40985 22777 0
DSLD Entry Date2024-01-24
Product TypeOther Combinations
FormCapsule
Brand21st Century
DSLD ID304097
Data Updated2026-04-11
Research

Research Evidence

849
Research Sources
56
Avg Quality
450
Meta Analysis
152
Rct
137
Systematic Review
73
Clinical Trial
11
Regulatory Source
7
Other
7
Guideline
3
Openfda Safety
2
Cochrane Review
2
Observational
A Phosphate binders for preventing and treating chronic kidney disease-mineral and bone disorder (CKD-MBD)
Meta Analysis The Cochrane database of systematic reviews 2018 PubMed DOI
A Calcium supplementation (other than for preventing or treating hypertension) for improving pregnancy and infant outcomes
Meta Analysis The Cochrane database of systematic reviews 2024 PubMed DOI
A Calcium supplementation (other than for preventing or treating hypertension) for improving pregnancy and infant outcomes
Meta Analysis The Cochrane database of systematic reviews 2015 PubMed DOI
A Vitamin and mineral supplementation for maintaining cognitive function in cognitively healthy people in mid and late life
Meta Analysis The Cochrane database of systematic reviews 2018 PubMed DOI
A Calcium supplementation during pregnancy for preventing hypertensive disorders and related problems
Meta Analysis The Cochrane database of systematic reviews 2025 PubMed DOI
A Dietary calcium supplementation for preventing colorectal cancer and adenomatous polyps
Systematic Review The Cochrane database of systematic reviews 2008 PubMed DOI
A Calcium and vitamin D for increasing bone mineral density in premenopausal women
Systematic Review The Cochrane database of systematic reviews 2023 PubMed DOI
A Dietary sodium, sodium-to-potassium ratio, and risk of stroke: A systematic review and nonlinear dose-response meta-analysis
Meta Analysis Clinical nutrition (Edinburgh, Scotland) 2019 PubMed DOI
A The association between circulating magnesium and clinically relevant outcomes in patients with chronic kidney disease: A systematic review and meta-analysis
Meta Analysis Clinical nutrition (Edinburgh, Scotland) 2021 PubMed DOI
A Calcium channel blockers versus other classes of drugs for hypertension
Systematic Review The Cochrane database of systematic reviews 2021 PubMed DOI
View all evidence for Electrolytes →
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.