$23.09 $0.76 per serving
Product analysis
Stronger Bones supplies calcium and vitamin D to support normal bone nutrition, especially when dietary intake is low. Its serving cost is relatively high compared with calcium or vitamin K supplements.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality40
Vitamin K includes the favorable MK-7 form alongside another form. Eggshell identifies the calcium source without establishing its exact chemical form or absorption advantage.
Ingredient Transparency100
Amounts and forms are disclosed, including the separate vitamin K forms. The breakdown helps identify what is included without treating distinct declarations as a single combined amount.
Value For Money28
The full serving is relatively expensive by both the calcium and vitamin K comparisons. Vitamin D’s separate contribution to value cannot be judged reliably.
Customer Satisfaction70
Customer feedback is generally favorable across hundreds of ratings. The review base gives a useful picture of satisfaction, without confirming health effects.
Product Focus72
Bone nutrition is the clearest purpose, particularly when calcium or vitamin D intake is low. Heart-related support is much less certain, and the vitamin K amount is below the relevant comparison exposure.
- Format
Tablet - Container
- 150 Tablet(s)
- Per serving
- $0.76
- Customer rating
- 4.6 · 117 ratings
Goals
Impact
Highest effect
Vitamin K · 20 mcgCalcium · 1300 mgVitamin D · 20 mcg
Impact
Moderate effect
Vitamin K · 20 mcgVitamin D · 20 mcg
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
Vitamin D (Cholecalciferol) | 20 mcg | |
Vitamin K (Phylloquinone) | 90 mcg | |
Calcium (Eggshell Calcium) | 1300 mg | |
Vitamin K2 (Menaquinone-7) | 20 mcg |
Vitamin K (Phylloquinone) · 90 mcg OverallScore57
Each serving provides 90 mcg of K1 and 20 mcg of K2 as MK-7 at a high cost per serving. It includes K1 and MK-7, but the MK-7 isomer is not specified. The MK-7 amount is small.
How this ingredient is rated
Active Ingredient Quality & Bioavailability82
It includes K1 and MK-7, but the MK-7 isomer is not specified.
Vitamin K Form (MK-7 vs. MK-4 vs. K1)
The vitamin K comes from K1 and K2 as MK-7.
MK-7 Isomer Disclosure
The MK-7 isomer is not specified.
Dose, Safety & Label Transparency50
The amounts of K1 and MK-7 are listed separately. The 20 mcg of MK-7 per serving is a small amount.
Vitamin K2 (MK-7) Dosage Efficacy
The 20 mcg of MK-7 per serving is a small amount.
Form and Subtype Transparency
The amounts of K1 and MK-7 are listed separately.
Value20
The cost per serving is high.
Price per Effective MK-7 Serving
The cost per serving is high.
Calcium (Eggshell Calcium) · 1300 mg OverallScore34
The serving provides 1300 mg of calcium per serving at a high cost per serving. The calcium form is unknown. No flagged artificial additives or flow agents are listed; sugar is unknown.
How this ingredient is rated
Active Ingredient Quality & Bioavailability30
The calcium form is unknown. The calcium amount is stated.
Calcium Form & Absorption Potential
The calcium form is unknown, so its source cannot be compared.
Elemental Calcium Transparency
The calcium amount is stated as 1300 mg per serving.
Dose, Safety & Label Transparency46
The serving provides 1300 mg of calcium. Some of this large serving may not be absorbed. No flagged artificial additives or flow agents are listed; sugar is unknown.
Absorption-Optimized Serving Dose
The serving provides 1300 mg of calcium. Some of this large serving may not be absorbed.
Formulation Purity & Additives
No flagged artificial additives or flow agents are listed; sugar is unknown.
Value20
The cost per serving is high.
Price Per Serving Efficiency
The cost per serving is high.
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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.
- 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.
- Vitamin D supplementation for cardiometabolic risk markers in pregnant women based on the gestational diabetes mellitus or obesity status : a randomized clinical trial.
- Paricalcitol and endothelial function in chronic kidney disease trial.
- Vitamin D Supplementation, Serum 25(OH)D Concentrations and Cardiovascular Disease Risk Factors: A Systematic Review and Meta-Analysis.
- Does vitamin D supplementation modulate metabolic risk factors of cardiovascular disease? A systematic review and meta-analysis of clinical trials.
- Comparative Efficacy of Nutraceuticals on Endothelial Function: A Systematic Review and Network Meta-Analysis.