Calcium Citrate Magnesium and Zinc

Calcium Citrate Magnesium and Zinc

Kirkland Signature4.6 (152 ratings)
Format:Tablet Quantity: 500 Tablet(s) · 250 servings
Goals
$17.85 $0.07 per serving

Product analysis

54 out of 100

Calcium Citrate Magnesium and Zinc combines minerals for people seeking bone-related nutrition. The amounts are easier to check than the unspecified preparation details.

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

Nutrient Quality20

The ingredient preparations are unspecified, limiting reliable absorption comparisons. That missing detail should not be read as proof that the minerals are poorly absorbed.

Ingredient Transparency63

Each listed amount is stated, helping with intake checks. Ingredient-form details remain unspecified, making closer quality comparisons difficult.

Value For Money58

Calcium and copper appear to offer favorable value, while boron is more moderate. Value for magnesium, zinc and the vitamins remains uncertain, leaving the full combination harder to compare.

Customer Satisfaction70

The ratings are generally very positive. The smaller review pool provides a more limited picture of customer opinion.

Product Focus87

The mineral combination has a clear bone-related nutritional purpose. Several ingredients support that same purpose rather than establishing separate benefits.

Format
Tablet
Container
500 Tablet(s)
Per serving
$0.07
Customer rating
4.6 · 152 ratings
Report analysis

Goals

Bone Health
Impact
Highest effect
B Ingredient FitA- PathwaysA+ EvidenceA+ Formulation Logic
Magnesium · 80 mgCalcium · 500 mgVitamin D · 20 mcgCopper · 1 mgManganese · 1 mgBoron · 1 mgZinc · 10 mg
Study evidence
Boron Supportive 5 studies
Calcium Supportive 144 studies
Copper Disputed 20 studies
Magnesium Supportive 48 studies
Manganese Adverse 12 studies
Vitamin D Supportive 202 studies
Zinc Supportive 33 studies

Ingredients

IngredientAmount per servingScore
Vitamin D3
20 mcg
Vitamin B6
10 mg
Calcium
500 mg 70
Magnesium
80 mg
Zinc
10 mg
Copper
1 mg 63
Manganese
1 mg
Boron
1 mg 56
Gluten Free Adults 18–50
Report overview
Calcium · 500 mg OverallScore70
D- Active Ingredient Quality & BioavailabilityB+ Dose, Safety & Label TransparencyA+ Value
Copper · 1 mg OverallScore63
F Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyA+ Value
Boron · 1 mg OverallScore56
F Active Ingredient Quality & BioavailabilityB+ Dose, Safety & Label TransparencyC Value
Each serving supplies 1 mg of boron, and the cost is moderate relative to that amount. The amount is stated clearly. The boron source is unspecified; Bororganic Glycine appears separately in Other Ingredients, so its contribution to the boron total is unclear.
How this ingredient is rated

Active Ingredient Quality & Bioavailability29

The boron source is unspecified; Bororganic Glycine appears separately in Other Ingredients, so its contribution to the boron total is unclear. No specific purity or third-party mineral testing claim is available.
Boron Form & Bioavailability
The boron source is unspecified; Bororganic Glycine appears separately in Other Ingredients, so its contribution to the boron total is unclear.
Trademarked & High-Purity Sources
No specific purity or third-party mineral testing claim is available.

Dose, Safety & Label Transparency80

The label states the elemental boron amount. 1 mg provides a modest boron amount.
Elemental Dose Transparency
The label states the elemental boron amount.
Dosage Efficacy & Safety Margin
1 mg provides a modest boron amount.

Value60

The cost is moderate relative to the boron amount.
Price per 3mg Elemental Boron
The cost is moderate relative to the boron amount.
Report alternatives

Sources

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

  1. [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
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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