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Calcium Citrate Magnesium and Zinc

Kirkland Signature
4.6
★ ★ ★ ★ ★
(152 ratings)
Calcium 500 mg
Copper 1 mg
Boron 1 mg
Product Image
Score77
A very economical calcium blend with D3, zinc, copper, manganese, and boron. Unconfirmed mineral forms and modest magnesium limit quality assessment.
How scoring works
Quantity:500 Tablet(s) • (250 servings)
Goals:
Bone Health

Score 77

A very economical calcium blend with D3, zinc, copper, manganese, and boron. Unconfirmed mineral forms and modest magnesium limit quality assessment.
How scoring works
$17.85($0.07 per serving)
Walmart
$ 17.85
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Analysis

Two tablets provide 500 mg calcium, 80 mg magnesium, 10 mg zinc, vitamin D3, copper, manganese, boron, and B6. The combination is well aligned with basic bone support and offers a sensible zinc-to-copper balance.

Form transparency is the main weakness because none of the mineral compounds are confirmed in the supplied details. Magnesium is also modest relative to calcium, so the formula does not provide balanced high-depth coverage of both major minerals.

The product suits budget-focused adults who want a straightforward bone-support blend. Users with known absorption or tolerance needs may prefer a label that clearly identifies every mineral form.

Who is it for
  • Budget-focused adults seeking bone support
  • People wanting calcium with vitamin D3 and trace minerals
  • Users without specific mineral-form requirements
Best for
  • Basic calcium supplementation
  • Combining D3 with bone cofactors
  • Low-cost daily mineral coverage

Pros

  • Provides 500 mg calcium and vitamin D3
  • Includes zinc, copper, manganese, and boron
  • Offers a sensible zinc-to-copper balance
  • Very low serving cost
  • Two-tablet serving is manageable

Cons

  • Mineral forms are not confirmed
  • Magnesium amount is modest
  • Absorption quality cannot be judged
  • Not a high-depth magnesium supplement

Warnings

  • Calcium and magnesium can reduce absorption of levothyroxine, bisphosphonates, and tetracycline-class antibiotics when taken together, so doses need separation.
  • People with kidney disease should review combined calcium, magnesium, and vitamin D use clinically.
  • Daily vitamin B6 should be counted with other B6 supplements to avoid unnecessary long-term stacking.

Nutrient quality

81 Highest impact

Vitamin D3 is identified, but the chemical forms of every listed mineral are missing. Calcium and vitamin D3 are useful, while magnesium and boron provide smaller supporting amounts.

.

Ingredient transparency

69 High impact

Every listed active nutrient has a specific amount. The supplied data does not include a complete inactive ingredient list.

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Customer satisfaction

66 High impact

The aggregate satisfaction measure and review volume support a favorable first impression. Missing firsthand feedback leaves repeat complaints and real-world purpose fit uncertain.

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Value for money

94 Highest impact

The very low product cost supports the broad bone-focused nutrient coverage. Each serving provides excellent value for meaningful calcium and vitamin D3.

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Report analysis

Goals

Bone Health
Bone Health
Impact
Highest effect
A- Goal FitB- Strength of SupportB CoverageB+ Formula Quality
Magnesium · 80 mgCalcium · 500 mgVitamin D · 20 mcgCopper · 1 mgManganese · 1 mgBoron · 1 mgZinc · 10 mg

Calcium and vitamin D3 anchor a broad mineral blend that supports bone structure and calcium use. Magnesium, zinc, copper, manganese, and boron add complementary nutritional coverage.

The calcium amount is well sized, but several supporting minerals are modest. Missing chemical forms make absorption quality difficult to judge despite clear active amounts.

Study evidence
Boron Supportive 5 studies
Calcium Supportive 144 studies
Copper Disputed 20 studies
Magnesium Supportive 48 studies
Manganese Adverse 12 studies
Vitamin B6 Disputed 18 studies
Vitamin D Supportive 202 studies
Zinc Supportive 33 studies

Ingredients

IngredientAmount per serving
Vitamin D3
20 mcg
Vitamin B6
10 mg
Calcium
500 mg
Magnesium
80 mg
Zinc
10 mg
Copper
1 mg
Manganese
1 mg
Boron
1 mg
Gluten Free Adults 18–50
Report overview
Calcium · 500 mg OverallScore72
F Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value

The clearly stated 500 mg calcium amount is well sized for absorption in one serving. The specific calcium form is missing, so its absorption potential cannot be judged from the supplied label data. The very low serving cost supports strong value, while the listed formula shows no artificial colors, sweeteners, or titanium dioxide.

View ingredientView products
Copper · 1 mg OverallScore54
F Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyA+ Value

The copper amount supports basic maintenance, and its balance with zinc falls within the preferred range. The missing copper compound prevents a meaningful judgment about absorption quality. The very low serving cost offers strong value, especially for people seeking the broader calcium, magnesium, and zinc blend.

View ingredientView products
Boron · 1 mg OverallScore49
F Active Ingredient Quality & BioavailabilityC+ Dose, Safety & Label TransparencyC Value

The label states a boron amount but does not identify its chemical form or source quality. The low dose falls short of the preferred range for targeted boron use. Its low serving cost still produces fair normalized value, although boron is secondary within a broad mineral formula.

View ingredientView products
Loading alternative details
84 Performance

Advanced Bone Support

Thorne
Calcium malate, magnesium malate, vitamin D3, boron, active vitamin B6, and methylcobalamin provide clearer, more purposeful forms than the original’s unspecified minerals. Calcium and magnesium are moderate and vitamin K is absent, but ingredient quality is easier to assess.
83 Performance

Cal/Mag Citrate

NaturesPlus
Citrate forms of calcium and magnesium plus boron citrate create a focused mineral combination with favorable absorption potential. The original provides vitamin D3 and more cofactors, while this alternative offers clearer mineral identities and useful amounts.
83 Performance

Nutra-Support Bone

Carlson
Citrate minerals, vitamin D3, chelated zinc and manganese, and boron provide a more transparent bone-support design. The four-softgel serving is less convenient, but the forms are better defined than the original’s unspecified minerals.
76 Budget

600+D3

Caltrate
No eligible candidate is actually cheaper per serving than the original; this is one of the closest budget options. Calcium and vitamin D3 remain substantial, but missing mineral forms provide no transparency improvement.
85 Budget

BoneUp

Jarrow Formulas
No eligible option undercuts the original’s very low serving cost, though this is among the nearest alternatives. Hydroxyapatite calcium, vitamin K2, magnesium, and trace minerals broaden bone support, while magnesium oxide and low boron remain trade-offs.
77 Budget

Calcium Magnesium plus Boron

Solgar
The candidate pool has no truly cheaper match, but this is a relatively economical alternative. Citrate and gluconate forms improve part of the mineral profile, while carbonate, oxide, and a large single calcium amount limit the advantage.
85 Value

BoneUp

Jarrow Formulas
Hydroxyapatite calcium, vitamin D, vitamin K2, magnesium, and trace minerals add broader bone support at a still-moderate recurring cost. Magnesium oxide and low boron limit the formula, but the combination offers more form detail than the original.
71 Value

Calcium Citrate Mini-Tablets

Rainbow Light
Calcium citrate, vitamin D3, and boron glycinate provide clearly named forms and a coherent bone-focused base. The serving costs more and the large calcium amount is better divided, so value depends on prioritizing form clarity over economy.
76 Value

Bone Strength Collagen Formula

Life Extension
Vitamin D3, calcium, magnesium citrate, boron, silicon, and plum polyphenols broaden structural support beyond the original mineral blend. The high recurring cost and modest magnesium and silicon amounts weaken value, making it suitable only when the extra ingredients matter.
Report alternatives

Sources

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

  1. Treatment with alendronate plus calcium, alendronate alone, or calcium alone for postmenopausal low bone mineral density.
    Bonnick S; Broy S; Kaiser F; Teutsch C; Rosenberg E; DeLucca P; Melton M · Current medical research and opinion · 2007
    Randomized trial701 participantsBone Health forCalcium
  2. Associations of dietary calcium intake with metabolic syndrome and bone mineral density among the Korean population: KNHANES 2008-2011.
    Kim MK; Chon SJ; Noe EB; Roh YH; Yun BH; Cho S; Choi YS; Lee BS; Seo SK · Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2018
    Cross-sectional study14,705 participantsBone Health forCalcium
  3. Calcium supplementation during pregnancy and maternal and offspring bone health: a systematic review and meta-analysis.
    Tihtonen K; Korhonen P; Isojärvi J; Ojala R; Ashorn U; Ashorn P; Tammela O · Annals of the New York Academy of Sciences · 2022
    Meta-analysis1,566 participants7 studies pooledBone Health forCalcium
  4. The Association between Dietary and Circulating Copper Levels and Osteoporosis: a Scoping Review.
    Ju Y; Xiong W; Pang Y; Chen Z; Hou J; Zheng S; Li Z; Liu T; Xia H; Xia M; Zhong Y; Li J; Jiang X · Biological trace element research · 2026
    Scoping review18 studies pooledBone Health forCopper
  5. Serum copper levels are associated with bone mineral density and total fracture.
    Qu X; He Z; Qiao H; Zhai Z; Mao Z; Yu Z; Dai K · Journal of orthopaedic translation · 2022
    Cross-sectional study722 participantsBone Health forCopper
  6. Associations of dietary copper intake with total bone mineral density and lumbar spine bone mineral density in American adults.
    Hu M; Wang Z; Li C; Zheng Y; Hu J · Medicine · 2025
    Cross-sectional studyBone Health forCopper
  7. Effect of dietary boron on mineral, estrogen, and testosterone metabolism in postmenopausal women.
    Nielsen FH; Hunt CD; Mullen LM; Hunt JR · FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 1987
    Single-arm trial12 participantsBone Health forBoron
  8. The relationship between boron and magnesium status and bone mineral density in the human: a review.
    Volpe SL; Taper LJ; Meacham S · Magnesium research · 1994
    Narrative reviewBone Health forBoron
  9. Effects of boron supplementation on bone mineral density and dietary, blood, and urinary calcium, phosphorus, magnesium, and boron in female athletes.
    Meacham SL; Taper LJ; Volpe SL · Environmental health perspectives · 1995
    Randomized trial28 participantsBone Health forBoron
  10. [Comparative study of the urinary excretion of boron, calcium, magnesium and phosphorus in postmenopausal women with and without osteoporosis].
    José Ramón V; Mora Mora M; Marino Alarcón O; Hernández G; Josefina Linares L; Urdaneta Romero H; Arévalo González E · Investigacion clinica · 2013
    Case-control study45 participantsBone Health forBoron
  11. Metabolic responses of postmenopausal women to supplemental dietary boron and aluminum during usual and low magnesium intake: boron, calcium, and magnesium absorption and retention and blood mineral concentrations
    C D Hunt, J L Herbel, F H Nielsen · The American Journal of Clinical Nutrition · 1997
    Non-randomized trial11 participantsBone Health forBoron
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. Association between dietary copper, iron, zinc, selenium intake and osteopenia or osteoporosis in elderly hypertensive patients: a retrospective cohort study.
    Chen M; Jia L; Gao R · Frontiers in nutrition · 2024
    Cohort study5,286 participantsBone Health forCopper
  18. The association between dietary mineral intake and bone mineral density: a cross-sectional study.
    Wei M; Wei J; Huang S · Journal of health, population, and nutrition · 2025
    Cross-sectional study11,520 participantsBone Health forCopper
  19. Association between dietary copper intake and bone mineral density in children and adolescents aged 8-19 years: A cross-sectional study.
    Cui A; Yan J; Li H; Fan Z; Wei X; Wang H; Zhuang Y · PloS one · 2024
    Cross-sectional study6,965 participantsBone Health forCopper
  20. 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
  21. 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
  22. 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
  23. 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
  24. 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
  25. Risk of Environmental Chemicals on Bone Fractures Is Independent of Low Bone Mass in US Adults: Insights from 2017 to 2018 NHANES.
    Ling R; Ai Y; Chen C; Zhang J; Zou Z; Cheng S; Li C; Li X; Wang B · Metabolites · 2023
    Cross-sectional study2,640 participantsBone Health forManganese
  26. The Manganese-Bone Connection: Investigating the Role of Manganese in Bone Health.
    Taskozhina G; Batyrova G; Umarova G; Issanguzhina Z; Kereyeva N · Journal of clinical medicine · 2024
    Narrative reviewBone Health forManganese
  27. Associations of multiple metals with bone mineral density: A population-based study in US adults.
    Wei MH; Cui Y; Zhou HL; Song WJ; Di DS; Zhang RY; Huang Q; Liu JA; Wang Q · Chemosphere · 2021
    Cross-sectional studyBone Health forManganese
  28. Sex-specific associations of urinary mixed-metal concentrations with femoral bone mineral density among older people: an NHANES (2017-2020) analysis.
    Li H; Li G; Yi M; Zhou J; Deng Y; Huang Y; He S; Meng X; Liu L · Frontiers in public health · 2024
    Cross-sectional study31 participantsBone Health forManganese
  29. Relationship between blood manganese and bone mineral density and bone mineral content in adults: A population-based cross-sectional study.
    Wang C; Zhu Y; Long H; Ou M; Zhao S · PloS one · 2022
    Cross-sectional study9,732 participantsBone Health forManganese
  30. The Effects of the AGE Inhibitor Pyridoxamine on Bone in Older Women With Type 2 Diabetes: A Randomized Clinical Trial.
    Brossfield AV; McMahon DJ; Fernando J; Omeragic B; Majeed R; Agarwal S; Sroga GE; Wang B; Vashishth D; Rubin MR · The Journal of clinical endocrinology and metabolism · 2025
    Randomized trial55 participantsBone Health forVitamin B6
  31. Dietary B vitamin intake and risk of hip fracture: the Singapore Chinese Health Study.
    Dai Z; Wang R; Ang LW; Yuan JM; Koh WP · Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2014
    Cohort study63,257 participantsBone Health forVitamin B6
  32. Hip fracture patients may be vitamin B6 deficient. Controlled study of serum pyridoxal-5'-phosphate.
    Reynolds TM; Marshall PD; Brain AM · Acta orthopaedica Scandinavica · 1993
    Case-control study103 participantsBone Health forVitamin B6
  33. Degree of mineralization-related collagen crosslinking in the femoral neck cancellous bone in cases of hip fracture and controls.
    Saito M; Fujii K; Marumo K · Calcified tissue international · 2006
    Case-control study50 participantsBone Health forVitamin B6
  34. Adequate Intake and Supplementation of B Vitamins, in Particular Folic Acid, can Play a Protective Role in Bone Health.
    Rondanelli M; Tartara A; Fossari F; Vecchio V; Faliva MA; Naso M; Perna S; Nichetti M; Peroni G · Current aging science · 2022
    Narrative review35,298 participants29 studies pooledBone Health forVitamin B6
  35. 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
  36. 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
  37. 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
  38. 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
  39. 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
  40. 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
  41. 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
  42. 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
  43. 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
  44. 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