Calcium Magnesium & Zinc

Calcium Magnesium & Zinc

Sundown4.7 (25,011 ratings)
Format:Tablet Quantity: 100 Tablet(s) · 33 servings
Goals
$5.35 $0.16 per serving

Product analysis

62 out of 100

Calcium Magnesium & Zinc combines minerals that support bone nutrition and normal body functions when dietary intake is low. The proportions of its mixed mineral forms are omitted, making absorption comparisons harder.

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

Nutrient Quality30

The mineral mixtures include forms with differing absorption potential. Their undisclosed proportions make it difficult to judge how much the more favorable forms contribute.

Ingredient Transparency80

Every mineral amount and form is named, making the contents easier to identify. The proportions of the mixed forms are omitted, so each form’s contribution remains unclear.

Value For Money72

Calcium and zinc compare favorably on serving cost. Magnesium offers a less clear price advantage because its mix includes forms with different value profiles and undisclosed proportions.

Customer Satisfaction92

Customer feedback is very positive across a very large number of ratings. That provides a broad picture of satisfaction without proving health benefits.

Product Focus58

The short mineral formula supports several normal functions, with the clearest relevance to low nutrient intake. Its many intended uses do not establish broad improvements when calcium, magnesium and zinc needs are already met.

Format
Tablet
Container
100 Tablet(s)
Per serving
$0.16
Customer rating
4.7 · 25,011 ratings
Report analysis

Goals

Impact
Highest effect
A- Ingredient FitA+ PathwaysA- EvidenceA+ Formulation Logic
Magnesium · 400 mgZinc · 25 mg
Study evidence
Magnesium Supportive 114 studies
Zinc Supportive 60 studies
Bone Health
Impact
Highest effect
A- Ingredient FitB+ PathwaysA+ EvidenceA Formulation Logic
Magnesium · 400 mgCalcium · 1000 mgZinc · 25 mg
Study evidence
Calcium Supportive 144 studies
Magnesium Supportive 48 studies
Zinc Supportive 33 studies
Immunity
Impact
Highest effect
B Ingredient FitD+ PathwaysA+ EvidenceA+ Formulation Logic
Magnesium · 400 mgZinc · 25 mg
Study evidence
Magnesium Supportive 8 studies
Zinc Supportive 73 studies
Testosterone Support
Impact
Highest effect
B+ Ingredient FitB- PathwaysA EvidenceA+ Formulation Logic
Magnesium · 400 mgZinc · 25 mg
Study evidence
Magnesium Disputed 5 studies
Zinc Disputed 7 studies
Cardiovascular Support
Impact
High effect
C+ Ingredient FitD+ PathwaysB EvidenceA+ Formulation Logic
Magnesium · 400 mg
Study evidence
Magnesium Supportive 123 studies
Stress Relief
Impact
High effect
B+ Ingredient FitB- PathwaysB EvidenceA+ Formulation Logic
Magnesium · 400 mg
Study evidence
Magnesium Supportive 13 studies
Zinc Supportive 9 studies

Ingredients

IngredientAmount per servingScore
Calcium (Calcium Carbonate, Calcium Gluconate)
1000 mg 59
Magnesium (Magnesium Gluconate, Magnesium Oxide)
400 mg 50
Zinc (Zinc Citrate, Zinc Oxide)
25 mg 56
Gluten Free Adults 18–50 Dairy Free Sugar Free Vegetarian
Report overview
D Active Ingredient Quality & BioavailabilityD Dose, Safety & Label TransparencyA+ Value
Each serving provides 1000 mg of calcium, a substantial amount, at a low cost per serving. The sources are calcium carbonate and calcium gluconate, but their proportions are unknown. The ingredients include a flow agent; its identity is not specified in the available information.
How this ingredient is rated

Active Ingredient Quality & Bioavailability48

The sources are calcium carbonate and calcium gluconate, but their proportions are unknown. The calcium amount is stated.
Calcium Form & Absorption Potential
The sources are calcium carbonate and calcium gluconate, but their proportions are unknown.
Elemental Calcium Transparency
The label states the calcium amount per serving.

Dose, Safety & Label Transparency48

Each serving provides 1000 mg of calcium, a substantial amount. Absorption may be less efficient at this amount per serving. The ingredients include a flow agent; its identity is not specified in the available information.
Absorption-Optimized Serving Dose
Each serving provides 1000 mg of calcium, a substantial amount. Absorption may be less efficient at this amount per serving.
Formulation Purity & Additives
The ingredients include a flow agent; its identity is not specified in the available information.

Value100

The cost per serving is low.
Price Per Serving Efficiency
The cost per serving is low.
F Active Ingredient Quality & BioavailabilityC+ Dose, Safety & Label TransparencyB+ Value
+4
The serving provides 25 mg zinc at a fairly low cost per serving; that's a substantial amount. It combines Zinc Citrate and Zinc Oxide, but the amounts of each are unknown. The copper amount is unknown, so the zinc-to-copper balance is unclear.
How this ingredient is rated

Active Ingredient Quality & Bioavailability32

It combines Zinc Citrate and Zinc Oxide, but the amounts of each are unknown.
Zinc Form Bioavailability
It combines Zinc Citrate and Zinc Oxide, but the amounts of each are unknown.

Dose, Safety & Label Transparency67

The label states 25 mg zinc, a substantial amount. The copper amount is unknown, so the zinc-to-copper balance is unclear.
Elemental Dose Transparency
The label states the elemental zinc amount and its source.
Zinc Dosage Safety & Effectiveness
25 mg zinc per serving is a substantial amount.
Zinc-to-Copper Mineral Balance
The copper amount is unknown, so the zinc-to-copper balance is unclear.

Value80

The cost per serving is fairly low.
Price Per Serving Efficiency
The cost per serving is fairly low.
F Active Ingredient Quality & BioavailabilityB+ Dose, Safety & Label TransparencyD Value
+5
The serving provides 400 mg of magnesium at a low whole-product cost per serving. It contains Magnesium Gluconate and Magnesium Oxide, with undisclosed proportions. The serving also contains 1000 mg of calcium.
How this ingredient is rated

Active Ingredient Quality & Bioavailability21

It contains Magnesium Gluconate and Magnesium Oxide, with undisclosed proportions. The chelation method and any specific chelation certification are not stated.
Magnesium Form & Absorption Potential
It contains Magnesium Gluconate and Magnesium Oxide, with undisclosed proportions.
Patented Materials & Chelation Quality
The chelation method and any specific chelation certification are not stated.

Dose, Safety & Label Transparency80

A serving provides 400 mg of magnesium. The serving also contains 1000 mg of calcium.
Elemental Yield Transparency
The label states 400 mg of elemental magnesium per serving.
Therapeutic Dosage Alignment
A serving provides 400 mg of magnesium.
Synergistic Formulation Logic
The serving also contains 1000 mg of calcium.

Value48

The whole-product cost per serving is low.
Price Per Elemental Quality
The whole-product cost per serving is low.
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. Increased incidence of fractures in middle-aged and elderly men with low intakes of phosphorus and zinc.
    Elmståhl S; Gullberg B; Janzon L; Johnell O; Elmståhl B · Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 1999
    Cohort study6,576 participantsBone Health forZinc
  12. Zinc Supplementation Increases Procollagen Type 1 Amino-Terminal Propeptide in Premenarcheal Girls: A Randomized Controlled Trial.
    Berger PK; Pollock NK; Laing EM; Chertin V; Bernard PJ; Grider A; Shapses SA; Ding KH; Isales CM; Lewis RD · The Journal of nutrition · 2016
    Randomized trial147 participantsBone Health forZinc
  13. Randomized controlled trial of prenatal zinc supplementation and fetal bone growth.
    Merialdi M; Caulfield LE; Zavaleta N; Figueroa A; Costigan KA; Dominici F; Dipietro JA · The American journal of clinical nutrition · 2004
    Randomized trial242 participantsBone Health forZinc
  14. The effects of zinc supplementation on serum zinc, alkaline phosphatase activity and fracture healing of bones.
    Sadighi A; Roshan MM; Moradi A; Ostadrahimi A · Saudi medical journal · 2009
    Randomized trial60 participantsBone Health forZinc
  15. Is Zinc an Important Trace Element on Bone-Related Diseases and Complications? A Meta-analysis and Systematic Review from Serum Level, Dietary Intake, and Supplementation Aspects.
    Ceylan MN; Akdas S; Yazihan N · Biological trace element research · 2021
    Meta-analysis40 studies pooledBone Health forZinc
  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
  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