Product analysis
Calcium 500 + D3 offers inexpensive nutritional support for bone mineralization when calcium intake is low. Its oyster source matters for people avoiding shellfish-derived ingredients.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality18
The oyster source does not identify the precise calcium compound. Calcium absorption remains uncertain, despite the clearly named vitamin D3 preparation.
Ingredient Transparency100
Both ingredient amounts and sources are disclosed. The oyster description still leaves the chemical form of calcium unclear.
Value For Money73
An older calcium serving-price comparison suggests an inexpensive option. Comparable vitamin D price information is unavailable, limiting that part of the judgment.
Customer Satisfaction91
Customer feedback is very positive across thousands of ratings. The broad review history gives satisfaction context without confirming bone outcomes.
Product Focus78
The combination focuses on calcium intake gaps and vitamin D support for absorption. Those normal nutrient roles do not establish routine fracture prevention when intake is adequate.
- Format
Tablet - Container
- 400 Tablet(s)
- Per serving
- $0.02
- Also available
Calcium 500 + D3$5.49- Customer rating
- 4.8 · 4,358 ratings
Goals
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
Vitamin D3 (Cholecalciferol) | 15 mcg | |
Calcium (Oyster) | 500 mg |
How this ingredient is rated
Active Ingredient Quality & Bioavailability30
Calcium Form & Absorption Potential
Elemental Calcium Transparency
Dose, Safety & Label Transparency60
Absorption-Optimized Serving Dose
Formulation Purity & Additives
Value100
Price Per Serving Efficiency
Alternative products
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.