Coral Calcium Plus

Coral Calcium Plus

NOW4.8 (2,581 ratings)
Format:Capsule Quantity: 100 Capsule(s) · 50 servings
Goals
$11.30 $0.22 per serving

Product analysis

62 out of 100

Coral Calcium Plus combines calcium, magnesium and vitamin D to help fill nutritional gaps and support normal bone maintenance. The undisclosed balance of magnesium forms makes its absorption harder to judge.

AI assessment of the formula, label and price. How scoring works

Nutrient Quality38

The magnesium mix includes more and less favored forms, with no proportions given. Coral calcium has no established extra bone benefit, and the quality of the vitamin D form remains uncertain.

Ingredient Transparency80

Amounts and forms are stated for the nutrients. The magnesium blend proportions are missing, so the exact balance of its forms is unclear.

Value For Money59

The calcium serving is economical, although that comparison is less current. The magnesium mix offers middling value, while vitamin D value remains uncertain.

Customer Satisfaction88

Customer feedback is highly positive across thousands of ratings. The response count provides a broad picture of satisfaction.

Product Focus65

The strongest fit is filling mineral gaps and supporting normal bone and muscle functions. Broader stress, hormone and heart benefits remain limited or inconsistent.

Format
Capsule
Container
100 Capsule(s)
Per serving
$0.22
Customer rating
4.8 · 2,581 ratings
Report analysis

Goals

Impact
High effect
B- Ingredient FitD+ PathwaysA+ EvidenceA+ Formulation Logic
Magnesium · 250 mgCalcium · 1.43 Gram(s)Vitamin D · 10 mcg
Study evidence
Calcium Supportive 144 studies
Magnesium Supportive 48 studies
Vitamin D Supportive 202 studies
Impact
High effect
B Ingredient FitD+ PathwaysA- EvidenceA+ Formulation Logic
Vitamin D · 10 mcgMagnesium · 250 mg
Study evidence
Magnesium Supportive 114 studies
Vitamin D Supportive 115 studies
Energy
Impact
Moderate effect
C Ingredient FitF PathwaysA- EvidenceA+ Formulation Logic
Vitamin D · 10 mcgMagnesium · 250 mg
Study evidence
Magnesium Supportive 4 studies
Vitamin D Supportive 32 studies
Impact
Moderate effect
C Ingredient FitF PathwaysB EvidenceA+ Formulation Logic
Vitamin D · 10 mcgMagnesium · 250 mg
Study evidence
Magnesium Supportive 13 studies
Vitamin D Supportive 41 studies
Impact
High effect
C Ingredient FitD- PathwaysA- EvidenceA+ Formulation Logic
Magnesium · 250 mgVitamin D · 10 mcg
Study evidence
Magnesium Supportive 158 studies
Vitamin D Mixed 164 studies
Impact
High effect
C Ingredient FitD- PathwaysB EvidenceA+ Formulation Logic
Magnesium · 250 mgVitamin D · 10 mcg
Study evidence
Magnesium Supportive 123 studies
Vitamin D Mixed 170 studies

Ingredients

IngredientAmount per servingScore
Vitamin D (Ergocalciferol)
10 mcg
Calcium (Coral Calcium)
500 mg 80
Magnesium (Magnesium Aspartate, Magnesium Citrate, Magnesium Oxide)
250 mg 58
fossilized Coral Calcium
1.43 Gram(s) 80
Gluten Free Adults 18–50 Dairy Free
Report overview
C+ Active Ingredient Quality & BioavailabilityB+ Dose, Safety & Label TransparencyA+ Value
The serving provides 500 mg of calcium at a low cost per serving. The calcium source is Coral Calcium. A flow agent is listed; the sugar amount is unknown.
How this ingredient is rated

Active Ingredient Quality & Bioavailability65

The calcium amount and its Coral Calcium source are stated.
Calcium Form & Absorption Potential
The calcium source is Coral Calcium.
Elemental Calcium Transparency
The label states 500 mg of calcium per serving.

Dose, Safety & Label Transparency84

Each serving provides 500 mg of calcium. A flow agent is listed; the sugar amount is unknown.
Absorption-Optimized Serving Dose
Each serving provides 500 mg of calcium.
Formulation Purity & Additives
A flow agent is listed; the sugar amount is unknown.

Value100

The cost per serving is low.
Price Per Serving Efficiency
The cost per serving is low.
F Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyD Value
250 mg of magnesium per serving comes at a low cost per serving. The magnesium comes from magnesium aspartate, magnesium citrate and magnesium oxide. The proportions are unknown. It also contains 500 mg of calcium.
How this ingredient is rated

Active Ingredient Quality & Bioavailability21

The magnesium comes from magnesium aspartate, magnesium citrate and magnesium oxide. The proportions are unknown.
Magnesium Form & Absorption Potential
The magnesium comes from magnesium aspartate, magnesium citrate and magnesium oxide. The proportions are unknown.
Patented Materials & Chelation Quality
The chelation standard is not specified.

Dose, Safety & Label Transparency100

The serving provides 250 mg of elemental magnesium. The serving also provides 500 mg of calcium.
Elemental Yield Transparency
The elemental magnesium amount per serving is stated.
Therapeutic Dosage Alignment
The serving provides 250 mg of elemental magnesium.
Synergistic Formulation Logic
The serving also provides 500 mg of calcium.

Value48

The whole-product cost per serving is low. The proportions of its magnesium forms are unknown.
Price Per Elemental Quality
The whole-product cost per serving is low. The proportions of its magnesium forms are unknown.
Report alternatives

Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. What is the impact of daily oral supplementation of vitamin D3 (cholecalciferol) plus calcium on the incidence of hip fracture in older people? A systematic review and meta-analysis.
    Manoj P; Derwin R; George S · International journal of older people nursing · 2023
    Meta-analysis12,620 participants7 studies pooledBone Health forCalcium
  2. Calcium supplementation prevents seasonal bone loss and changes in biochemical markers of bone turnover in elderly New England women: a randomized placebo-controlled trial.
    Storm D; Eslin R; Porter ES; Musgrave K; Vereault D; Patton C; Kessenich C; Mohan S; Chen T; Holick MF; Rosen CJ · The Journal of clinical endocrinology and metabolism · 1998
    Randomized trial60 participantsBone Health forCalcium
  3. The effects of calcium supplementation (milk powder or tablets) and exercise on bone density in postmenopausal women.
    Prince R; Devine A; Dick I; Criddle A; Kerr D; Kent N; Price R; Randell A · Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 1995
    Randomized trial168 participantsBone Health forCalcium
  4. The efficacy of calcium supplementation alone in elderly Thai women over a 2-year period: a randomized controlled trial.
    Rajatanavin R; Chailurkit L; Saetung S; Thakkinstian A; Nimitphong H · Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2014
    Randomized trial404 participantsBone Health forCalcium
  5. Calcium-enriched foods and bone mass growth in prepubertal girls: a randomized, double-blind, placebo-controlled trial.
    Bonjour JP; Carrie AL; Ferrari S; Clavien H; Slosman D; Theintz G; Rizzoli R · The Journal of clinical investigation · 1997
    Randomized trial149 participantsBone Health forCalcium
  6. Association between Serum Magnesium and Fractures: A Systematic Review and Meta-Analysis of Observational Studies.
    Dominguez LJ; Veronese N; Ciriminna S; Pérez-Albela JL; Vásquez-López VF; Rodas-Regalado S; Di Bella G; Parisi A; Tagliaferri F; Barbagallo M · Nutrients · 2023
    Meta-analysis119,755 participants4 studies pooledBone Health forMagnesium
  7. Bioabsorbable Magnesium-Based Materials Potential and Safety in Bone Surgery: A Systematic Review.
    Hung CH; Kwok YC; Yip J; Wong HH; Leung YY · Craniomaxillofacial trauma & reconstruction · 2025
    Systematic review386 participants8 studies pooledBone Health forMagnesium
  8. Vascularized bone grafting fixed by biodegradable magnesium screw for treating osteonecrosis of the femoral head.
    Zhao D; Huang S; Lu F; Wang B; Yang L; Qin L; Yang K; Li Y; Li W; Wang W; Tian S; Zhang X; Gao W; Wang Z; Zhang Y; Xie X; Wang J; Li J · Biomaterials · 2016
    Randomized trial48 participantsBone Health forMagnesium
  9. An update on magnesium and bone health.
    Rondanelli M; Faliva MA; Tartara A; Gasparri C; Perna S; Infantino V; Riva A; Petrangolini G; Peroni G · Biometals : an international journal on the role of metal ions in biology, biochemistry, and medicine · 2022
    Narrative reviewBone Health forMagnesium
  10. Sex-specific differences in the association of magnesium intake with femoral neck bone mineral density among older adults.
    Wang B; Tan X; Yao X; Zhu Z · Endocrine connections · 2025
    Cross-sectional study1,343 participantsBone Health forMagnesium
  11. Pregnancy vitamin D supplementation and offspring bone mineral density in childhood follow-up of a randomized controlled trial.
    Moon RJ; D' Angelo S; Curtis EM; Ward KA; Crozier SR; Schoenmakers I; Javaid MK; Bishop NJ; Godfrey KM; Cooper C; Harvey NC; MAVIDOS Trial Group · The American journal of clinical nutrition · 2024
    Randomized trial454 participantsBone Health forVitamin D
  12. Vitamin D analogs and bone: preclinical and clinical studies with eldecalcitol.
    Matsumoto T; Takano T; Saito H; Takahashi F · BoneKEy reports · 2014
    Narrative reviewBone Health forVitamin D
  13. Efficacy of vitamin D fortified foods on bone mineral density and serum bone biomarkers: A systematic review and meta-analysis of interventional studies.
    Tangestani H; Djafarian K; Emamat H; Arabzadegan N; Shab-Bidar S · Critical reviews in food science and nutrition · 2020
    Meta-analysis1,786 participants20 studies pooledBone Health forVitamin D
  14. Cholecalciferol Supplementation Attenuates Bone Loss in Incident Kidney Transplant Recipients: A Prespecified Secondary Endpoint Analysis of a Randomized Controlled Trial.
    Tsujita M; Doi Y; Obi Y; Hamano T; Tomosugi T; Futamura K; Okada M; Hiramitsu T; Goto N; Isaka Y; Takeda A; Narumi S; Watarai Y · Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2022
    Randomized trial193 participantsBone Health forVitamin D
  15. Vitamin D supplementation and bone health in post-menopausal women: a 24-month randomized controlled intervention with enhanced bioavailability formulations.
    Rasool N; Munir Y · European journal of clinical nutrition · 2026
    Randomized trial612 participantsBone Health forVitamin D
  16. Circulating and dietary magnesium and risk of cardiovascular disease: a systematic review and meta-analysis of prospective studies.
    Del Gobbo LC; Imamura F; Wu JH; de Oliveira Otto MC; Chiuve SE; Mozaffarian D · The American journal of clinical nutrition · 2013
    Meta-analysis313,041 participants16 studies pooledCardiovascular Support forMagnesium
  17. Magnesium and the risk of cardiovascular events: a meta-analysis of prospective cohort studies.
    Qu X; Jin F; Hao Y; Li H; Tang T; Wang H; Yan W; Dai K · PloS one · 2013
    Meta-analysis532,979 participants19 studies pooledCardiovascular Support forMagnesium
  18. Quantitative Association Between Serum/Dietary Magnesium and Cardiovascular Disease/Coronary Heart Disease Risk: A Dose-Response Meta-analysis of Prospective Cohort Studies.
    Zhao L; Hu M; Yang L; Xu H; Song W; Qian Y; Zhao M · Journal of cardiovascular pharmacology · 2020
    Meta-analysis544,581 participants18 studies pooledCardiovascular Support Heart Health forMagnesium
  19. Comparative Efficacy of Nutraceuticals on Endothelial Function: A Systematic Review and Network Meta-Analysis.
    Norouzzadeh M; Rashedi MH; Mahdavi-Mazdeh G; Kosari A; Shahinfar H · Current atherosclerosis reports · 2026
    Meta-analysisCardiovascular Support Heart Health forMagnesium Cardiovascular Support Heart Health forVitamin D
  20. Serum magnesium, mortality, and cardiovascular disease in chronic kidney disease and end-stage renal disease patients: a systematic review and meta-analysis.
    Xiong J; He T; Wang M; Nie L; Zhang Y; Wang Y; Huang Y; Feng B; Zhang J; Zhao J · Journal of nephrology · 2020
    Meta-analysis200,934 participants20 studies pooledCardiovascular Support forMagnesium