Coral Calcium 1000 mg

product on market Capsule 21st Century 🟢 Safety: 100/100
Brand: 21st Century
🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 67% of ingredients have research evidence
A Label Compliance Grade

Product Label

Label for Coral Calcium 1000 mg
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Label Data

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

Supplement Facts — Evidence Check

10 mcg (50% DV)
✅ Within RDA (0.7× RDA of 0.015 mg) 📚 604 studies (Tier A: 16, B: 251)
RDA 0.015mg This product: 0.01mg UL 0.1mg
Calcium
1000 mg (77% DV)
500 mg (119% DV)
📊 Market median: 4002.0mg (1 products) 📚 20 studies (Tier A: 0, B: 2)
This product: 500mg

Other Ingredients

Gelatin Magnesium Stearate Magnesium Silicate Maltodextrin Cellulose Silicon Dioxide Titanium Dioxide

Label Claims — Verification

❓ Nutrient
❓ All Other
❓ Structure/Function
All Other (99% of products) Structure/Function (85% of products) Nutrient (54% of products) Approved Health (3% of products)

Target Groups

Adult (18 - 50 Years) Gluten Free

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

Product Details

UPC / SKU 7 40985 22777 0
DSLD Entry Date 2024-01-24
Product Type Other Combinations
Form Capsule
Brand 21st Century
DSLD ID 304097
Data Updated 2026-04-11

Research Evidence

849 Research Sources
56 Avg Quality Score
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 Cochrane
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 Cochrane
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 Cochrane
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 Cochrane
A Calcium supplementation during pregnancy for preventing hypertensive disorders and related problems
Meta Analysis The Cochrane database of systematic reviews 2025
PubMed DOI Cochrane
A Dietary calcium supplementation for preventing colorectal cancer and adenomatous polyps
Systematic Review The Cochrane database of systematic reviews 2008
PubMed DOI Cochrane
A Calcium and vitamin D for increasing bone mineral density in premenopausal women
Systematic Review The Cochrane database of systematic reviews 2023
PubMed DOI Cochrane
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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