Cal-Mag Citrate with Vitamin D-3 & K-2 2:1 Ratio
Goals
$23.28 $0.77 per serving
Product analysis
Cal-Mag Citrate with Vitamin D-3 & K-2 2:1 Ratio offers combined mineral support for bone maintenance when dietary intake is low. Undisclosed magnesium-source proportions make absorption harder to judge.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality56
Calcium citrate and MK-7 provide favorable ingredient forms. The magnesium mixture includes less readily absorbed oxide in an undisclosed proportion, while D3 quality remains uncertain.
Ingredient Transparency80
All vitamin and mineral amounts and forms are stated, making the basic formula easy to check. Magnesium blend proportions are undisclosed, limiting detailed comparisons.
Value For Money27
The serving price is relatively high when judged for calcium or MK-7, and the magnesium blend offers limited value. Vitamin D value remains uncertain.
Customer Satisfaction85
Customer ratings are favorable. More than a thousand responses give a broad view of satisfaction.
Product Focus55
The selected two-capsule serving makes a partial contribution to calcium and magnesium needs. Its smaller D3 and K2 amounts offer limited grounds for expecting broader bone or heart benefits.
- Format
Capsule - Container
- 180 Capsule(s)
- Per serving
- $0.77
- Customer rating
- 4.7 · 1,670 ratings
Goals
Impact
High effect
Vitamin K · 50 mcgMagnesium · 500 mgCalcium · 1000 mgVitamin D · 25 mcg
Impact
High effect
Vitamin D · 25 mcgMagnesium · 500 mgVitamin K · 50 mcg
Impact
Moderate effect
Vitamin K · 50 mcgMagnesium · 500 mgVitamin D · 25 mcg
Impact
Moderate effect
Vitamin K · 50 mcgMagnesium · 500 mgVitamin D · 25 mcg
Impact
Moderate effect
Magnesium · 500 mgVitamin D · 25 mcg
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
Vitamin D (Cholecalciferol, Vitamin D3) | 25 mcg | |
Vitamin K (Menaquinone-7, Vitamin K2) | 50 mcg | |
Calcium (Calcium Citrate) | 1000 mg | |
Magnesium (Magnesium Citrate, Magnesium Oxide) | 500 mg |
Vitamin K (Menaquinone-7, Vitamin K2) · 50 mcg OverallScore70
Each serving provides 50 mcg of MK-7 at a high cost per serving. The MK-7 isomer is not specified.
How this ingredient is rated
Active Ingredient Quality & Bioavailability82
It uses vitamin K2 as menaquinone-7 (MK-7). The MK-7 isomer is not specified as trans or all-trans.
Vitamin K Form (MK-7 vs. MK-4 vs. K1)
It uses vitamin K2 as menaquinone-7 (MK-7).
MK-7 Isomer Disclosure
The MK-7 isomer is not specified as trans or all-trans.
Dose, Safety & Label Transparency83
The amount and MK-7 form are stated per serving.
Vitamin K2 (MK-7) Dosage Efficacy
50 mcg of MK-7 is stated per serving.
Form and Subtype Transparency
The 50 mcg vitamin K amount and MK-7 form are stated.
Value20
The cost per serving is high.
Price per Effective MK-7 Serving
The cost per serving is high.
Calcium (Calcium Citrate) · 1000 mg OverallScore58
A serving provides 1000 mg of calcium at a high cost per serving, though the large dose may not all be absorbed at once. It uses calcium citrate. A flow agent is listed.
How this ingredient is rated
Active Ingredient Quality & Bioavailability86
The calcium amount is stated. Calcium comes from calcium citrate.
Calcium Form & Absorption Potential
Calcium comes from calcium citrate.
Elemental Calcium Transparency
The label states 1000 mg of elemental calcium per serving.
Dose, Safety & Label Transparency48
The 1000 mg serving is large, and some calcium may not be absorbed in one dose. A flow agent is listed.
Absorption-Optimized Serving Dose
The 1000 mg serving is large, and some calcium may not be absorbed in one dose.
Formulation Purity & Additives
A flow agent is listed.
Value20
The cost per serving is high.
Price Per Serving Efficiency
The cost per serving is high.
Magnesium (Magnesium Citrate, Magnesium Oxide) · 500 mg OverallScore49
500 mg of magnesium per serving offers a stated amount; the serving cost is less favorable for the stated magnesium source. It uses Magnesium Citrate and Magnesium Oxide; the proportions are unknown.
How this ingredient is rated
Active Ingredient Quality & Bioavailability21
It uses Magnesium Citrate and Magnesium Oxide; the proportions are unknown. The chelation standard is unspecified.
Magnesium Form & Absorption Potential
It uses Magnesium Citrate and Magnesium Oxide; the proportions are unknown.
Patented Materials & Chelation Quality
The chelation standard is unspecified.
Dose, Safety & Label Transparency88
Each serving provides 500 mg of elemental magnesium. The serving also contains 1000 mg calcium.
Elemental Yield Transparency
The label states 500 mg of elemental magnesium per serving.
Therapeutic Dosage Alignment
Each serving provides 500 mg of elemental magnesium.
Synergistic Formulation Logic
The serving also contains 1000 mg calcium.
Value26
The serving cost is less favorable for the stated magnesium source.
Price Per Elemental Quality
The serving cost is less favorable for the stated magnesium source.
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Sources
Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.
- 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.
- Calcium supplementation prevents seasonal bone loss and changes in biochemical markers of bone turnover in elderly New England women: a randomized placebo-controlled trial.
- The effects of calcium supplementation (milk powder or tablets) and exercise on bone density in postmenopausal women.
- The efficacy of calcium supplementation alone in elderly Thai women over a 2-year period: a randomized controlled trial.
- Calcium-enriched foods and bone mass growth in prepubertal girls: a randomized, double-blind, placebo-controlled trial.
- Association between Serum Magnesium and Fractures: A Systematic Review and Meta-Analysis of Observational Studies.
- Bioabsorbable Magnesium-Based Materials Potential and Safety in Bone Surgery: A Systematic Review.
- Vascularized bone grafting fixed by biodegradable magnesium screw for treating osteonecrosis of the femoral head.
- An update on magnesium and bone health.
- Sex-specific differences in the association of magnesium intake with femoral neck bone mineral density among older adults.
- Pregnancy vitamin D supplementation and offspring bone mineral density in childhood follow-up of a randomized controlled trial.
- Vitamin D analogs and bone: preclinical and clinical studies with eldecalcitol.
- Efficacy of vitamin D fortified foods on bone mineral density and serum bone biomarkers: A systematic review and meta-analysis of interventional studies.
- Cholecalciferol Supplementation Attenuates Bone Loss in Incident Kidney Transplant Recipients: A Prespecified Secondary Endpoint Analysis of a Randomized Controlled Trial.
- Vitamin D supplementation and bone health in post-menopausal women: a 24-month randomized controlled intervention with enhanced bioavailability formulations.
- Vitamin K and the prevention of fractures: systematic review and meta-analysis of randomized controlled trials.
- Three-year low-dose menaquinone-7 supplementation helps decrease bone loss in healthy postmenopausal women.
- Effect of combined administration of vitamin D3 and vitamin K2 on bone mineral density of the lumbar spine in postmenopausal women with osteoporosis.
- Efficacy and safety of vitamin K2 for postmenopausal women with osteoporosis at a long-term follow-up: meta-analysis and systematic review.
- Low-dose vitamin K2 (MK-4) supplementation for 12 months improves bone metabolism and prevents forearm bone loss in postmenopausal Japanese women.