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Coral Calcium Plus 100 mg

4.8
★ ★ ★ ★ ★
(276 ratings)
Calcium 350 mg
Product Image
Score79
A coherent calcium, D3, and magnesium capsule with sensible calcium dosing, limited by coral-source ambiguity and magnesium oxide.
How scoring works
Capsule
Quantity:250 Capsule(s) • (125 servings)
Goals:
Bone Health

Score 79

A coherent calcium, D3, and magnesium capsule with sensible calcium dosing, limited by coral-source ambiguity and magnesium oxide.
How scoring works
$12.91($0.10 per serving)
iHerb
$ 17.21
Walmart
$ 14.99
iHerb
$ 12.91
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Analysis

The formula supplies 350 mg elemental calcium with vitamin D3 and magnesium, addressing mineral intake and absorption together. That calcium amount is efficient for a single serving and easier to tailor than an oversized dose.

Coral calcium is not shown to offer a functional advantage over conventional calcium forms, and its exact compound profile is not stated. Magnesium oxide is a weaker form for systemic magnesium support.

The capsule can fill a modest calcium gap but does not include vitamin K2 or collagen-matrix support. The 1,000 mg coral-calcium compound weight should not be confused with the much smaller elemental calcium amount.

Who is it for
  • Adults filling a modest calcium gap
  • Users wanting D3 and magnesium included
  • People who prefer capsules
Best for
  • Bone mineral support
  • Calcium plus vitamin D intake
  • Moderate daily calcium supplementation

Pros

  • Efficient elemental calcium amount
  • Includes vitamin D3
  • Includes magnesium
  • Clearly separates compound and elemental calcium

Cons

  • Coral source offers no established advantage
  • Uses magnesium oxide
  • No vitamin K2
  • No collagen-matrix support

Warnings

  • Calcium can interfere with levothyroxine, bisphosphonates, tetracycline antibiotics, and quinolone antibiotics; separate doses as directed.
  • People with high blood calcium or recurrent calcium-containing kidney stones should account for total calcium intake before use.

Nutrient quality

84 Highest impact

Coral calcium is a conventional source but offers no clear absorption advantage over citrate. The 350 mg calcium amount can supplement dietary intake but may not meet higher needs alone.

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Ingredient transparency

81 Highest impact

Active ingredients generally have stated amounts and no proprietary blend hides the doses. Missing other ingredients and complete intake directions leave important label details unresolved.

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Customer satisfaction

60 Moderate impact

The supplied average rating is strong and the rating volume provides a useful aggregate signal. No comment-level evidence is provided to assess recurring complaints or confirm how experience matches the intended purpose.

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Value for money

87 Highest impact

The active amount and formula quality support favorable serving value. Format ingredients or non-calcium actives reduce its value for dedicated calcium use.

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Report analysis

Goals

Bone Health
Bone Health
Impact
Highest effect
A+ Goal FitA- Strength of SupportA CoverageA+ Formula Quality
Magnesium · 125 mgCalcium · 1000 mgVitamin D · 10 mcg

The formula directly targets mineral structure, absorption, and remodeling with multiple bone-specific actives. Hydroxyapatite calcium, vitamin D, vitamin K, magnesium, and boron have strong complementary skeletal rationale.

The formula provides useful amounts across calcium, magnesium, vitamin D, K2, boron, and phosphorus. The formula covers mineral structure, absorption, remodeling, and trace-mineral support.

Study evidence
Calcium Supportive 144 studies
Magnesium Supportive 48 studies
Vitamin D Supportive 202 studies

Ingredients

IngredientAmount per serving
Vitamin D3 (Cholecalciferol)
 10 mcg
Calcium (Coral Calcium)
 350 mg
Magnesium (Magnesium Oxide)
 125 mg
Coral Calcium
1000 mg
Gluten Free Adults 18–50 Dairy Free Sugar Free
Report overview
Calcium (Coral Calcium) · 350 mg OverallScore79
C+ Active Ingredient Quality & BioavailabilityB+ Dose, Safety & Label TransparencyA+ Value

Coral calcium is a common but less readily absorbed form than citrate or chelated calcium. The clearly stated elemental amount provides a useful general supplemental dose without exceeding efficient single-dose absorption. The very low cost per serving and absence of listed controversial additives support good everyday value.

View ingredientView products
Loading alternative details
88 Performance

Calcium Hydroxyapatite Caps

NOW
<p>Hydroxyapatite supplies a practical calcium amount with naturally paired phosphorus and clear dosing. Clearer forms and stronger calcium focus improve practical usefulness compared with the original formula.</p>
85 Performance

Cal/Mag 500 mg/250 mg

NaturesPlus
<p>Chelated calcium and magnesium provide a balanced mineral formula with strong form quality. Broader mineral and vitamin coverage gives it more bone-support depth than the original focused calcium formula.</p>
82 Performance

Ultra BoneUp

Jarrow Formulas
<p>Calcium, vitamin D3, magnesium, MK-7, silicon, boron, and cartilage collagen cover several bone pathways. Broader mineral and vitamin coverage gives it more bone-support depth than the original focused calcium formula. Magnesium oxide is a weakness, and vitamin K2 needs caution with warfarin-type medicines.</p>
84 Budget

600 Calcium Supplement

21st Century
<p>A straightforward 600 mg calcium carbonate tablet provides a focused serving without unrelated actives. It lowers routine cost while maintaining direct calcium support, although carbonate still works best with food.</p>
85 Budget

Calcium Carbonate

NOW
<p>A pure calcium carbonate powder supplies a substantial dose with simple active disclosure. It lowers routine cost while maintaining direct calcium support, although carbonate still works best with food.</p>
84 Budget

Calcium 600 with Vitamin D3

Nature's Bounty
<p>Calcium carbonate and vitamin D3 provide a direct bone-support pairing in a focused formula. It lowers routine cost while maintaining direct calcium support, although carbonate still works best with food.</p>
88 Value

Calcium Citrate Pure Powder

NOW
<p>Calcium citrate powder provides a substantial, well-absorbed dose with flexible use and strong serving value. Clearer forms and stronger calcium focus improve practical usefulness compared with the original formula. It does not include vitamin D, vitamin K, or magnesium.</p>
82 Value

Calcium Citrate

Nature's Way
<p>Citrate and malate improve absorption flexibility within a practical mixed-calcium serving at strong value. Clearer forms and stronger calcium focus improve practical usefulness compared with the original formula.</p>
85 Value

600+D3

21st Century
<p>A reasonably sized calcium carbonate serving with vitamin D3 provides focused bone support at very low routine cost. Clearer forms and stronger calcium focus improve practical usefulness compared with the original formula. Calcium should be separated from levothyroxine and tetracycline or quinolone antibiotics.</p>
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