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Coral Calcium 1000 mg

21st Century
4.7
★ ★ ★ ★ ★
(1112 ratings)
Calcium 1000 mg
Magnesium 500 mg
Product Image
Score90

A naturally sourced marine mineral capsule that supports bone density and general health.

How scoring works
Quantity:120 Capsule(s) • (30 servings)
Goals:
General Health
Digestive Health
Bone Health
Heart Health
Stress Relief

Score 90

A naturally sourced marine mineral capsule that supports bone density and general health.

How scoring works
$15.99($0.53 per serving)
Amazon
$ 15.99
iHerb
$ 15.99
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Analysis

This capsule offers a high dose of calcium from a marine source, which many people prefer for its natural profile. It provides 500mg of magnesium, though some of that comes from magnesium oxide, which isn't the best for absorption.

It is well-suited for someone looking for a high-potency option for bone density. The 400 IU of Vitamin D3 helps support the immune system and assists the minerals in doing their job.

Pros

  • High elemental mineral yield
  • Includes Vitamin D3
  • Easy-to-swallow capsules

Cons

  • Reliance on magnesium oxide for part of the dose
  • High calcium-to-magnesium ratio

Warnings

  • Ensure you stay hydrated when taking high mineral doses
  • Coral sources should be checked for sustainability

Nutrient quality

84 Highest impact

Naturally derived minerals provide a traditional approach but include less bioavailable oxide forms. Meaningful elemental yields support core skeletal and metabolic requirements for mineral health.

Ingredient transparency

95 Highest impact

Label clearly identifies the source of minerals and the specific forms used in the composition. High transparency regarding elemental amounts supports precise nutritional tracking for bone health goals.

Customer satisfaction

95 Highest impact

Average rating of 4.74 across over a thousand reviews demonstrates high reliability and user satisfaction. Feedback suggests that the coral-based formula meets consumer expectations for effectiveness and tolerance.

Value for money

84 Highest impact

Price per serving is competitive for a naturally sourced mineral complex with added vitamin D3. Each capsule provides significant elemental yields relative to the total cost per bottle.

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Goals

General Health
Impact
Highest effect
A+ Goal FitB- Strength of SupportA- CoverageA Formula Quality

Calcium, Magnesium, and Vitamin D3 are provided to support foundational bone and cardiovascular health. These minerals are essential for hundreds of metabolic reactions contributing to systemic vitality.

Reliance on magnesium oxide reduces overall bioavailability for achieving peak systemic mineral repletion.

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Digestive Health
Impact
High effect
A- Goal FitB+ Strength of SupportC- CoverageB+ Formula Quality

Coral calcium and magnesium are provided in elemental amounts that support bowel regularity through osmotic action. Magnesium oxide, included at 500mg, is a standard intervention for promoting motility and stool softening.

While effective for stool regulation, the reliance on inorganic forms like oxide results in lower systemic bioavailability. This formulation is most appropriate for those specifically targeting digestive transit rather than systemic mineral repletion.

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Bone Health
Impact
High effect
B Goal FitC+ Strength of SupportC CoverageA- Formula Quality

The formulation contains coral-derived calcium and magnesium with added vitamin D3. It provides a standard 2:1 mineral ratio designed to support skeletal structural integrity.

Repletion of foundational minerals is addressed, although the reliance on magnesium oxide limits the bioavailability compared to organic chelated alternatives.

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Heart Health
Impact
High effect
C+ Goal FitC+ Strength of SupportC CoverageA Formula Quality

This coral calcium supplement provides 500 mg of magnesium and 1,000 mg of calcium per serving to support structural and cardiovascular health. It includes 400 IU of Vitamin D3 to assist in mineral absorption and systemic wellness.

While the mineral yields are robust, the reliance on magnesium oxide limits overall systemic bioavailability. This product offers a balanced mineral ratio suitable for individuals seeking bone and heart health support.

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Stress Relief
Impact
High effect
C+ Goal FitC Strength of SupportC- CoverageA- Formula Quality

This coral calcium supplement provides high levels of both Calcium and Magnesium, which are essential for overall health and the function of the nervous system. Magnesium serves as a foundational mineral for calming the body and managing the physiological effects of stress.

The reliance on magnesium oxide significantly limits the systemic bioavailability compared to more specialized organic chelates. This formula appears more aligned with bone health goals than targeted stress relief or mineral repletion.

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Energy
Impact
Moderate effect
B- Goal FitC- Strength of SupportD+ CoverageB- Formula Quality

Magnesium and Vitamin D3 are utilized to support metabolic cofactors and overall energy balance.

The reliance on poorly absorbed mineral forms and excessive calcium may limit its effectiveness for fatigue.

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Ingredients

IngredientAmount per serving
Vitamin D3 (Cholecalciferol)
 10 mcg
Calcium
1000 mg
Magnesium (Coral Calcium, Magnesium Oxide)
 500 mg
Gluten Free Adults 18–50
Report overview
Calcium · 1000 mg OverallScore62
C+ Active Ingredient Quality & BioavailabilityC Dose, Safety & Label TransparencyD+ Value
This coral-based supplement provides naturally derived calcium and magnesium along with vitamin D3. It is a good choice for those who prefer mineral sources from marine environments.
View ingredientView products
Magnesium (Coral Calcium, Magnesium Oxide) · 500 mg OverallScore48
F Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyF Value
This coral calcium supplement includes magnesium and vitamin D3 for bone health. While it provides high elemental doses, the reliance on magnesium oxide limits its overall systemic bioavailability.
View ingredientView products
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Magnesium Caps 500 mg

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(78048 ratings)
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Magnesium Triple Source

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★★★★★
(3071 ratings)
Combining citrate, malate, and oxide ensures a variety of absorption pathways while providing substantial elemental yields. Pyridoxine hydrochloride helps facilitate the cellular uptake and utilization of the mineral effectively.
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Advanced Calcium Complex

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4.8
★★★★★
(3580 ratings)
Provision of calcium glycinate and dicalcium malate ensures high bioavailability for mineralization and remodeling processes. Vitamin K2 and boron assist in the biological transport and regulation of these minerals within the structural matrix.
Other sellers (3)
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Chelated Calcium Magnesium 1:1

Solgar
4.7
★★★★★
(510 ratings)
Organic chelates like glycinate and citrate provide superior absorption compared to coral-derived minerals or inorganic salts. This balanced ratio supports healthy heart rhythms and muscular function with excellent digestive tolerance.
Other sellers (0)
94 Performance

Cal/Mag with Whole Foods

NaturesPlus
4.8
★★★★★
(539 ratings)
Aminoate complexes derived from brown rice offer high solubility and excellent bioavailability for foundational skeletal health. A whole-food blend provides additional nutrient synergy for better overall mineral utilization.
Other sellers (1)
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