Calcium 500 mg Plus Vitamin D
Sundown Naturals Calcium 500 mg Plus Vitamin D is a single vitamin and mineral supplement targeting joint and bone health. Each tablet provides 500mg of Calcium, which is considered a clinically studied dose for bone support. However, the accompanying 125 IU of Vitamin D is underdosed for optimal absorption and bone health benefits, as higher doses are often recommended. The product has an N+ Score of 55, earning an F grade, primarily due to the insufficient Vitamin D dosage. With only two ingredients, it offers excellent label transparency. This supplement may be beneficial for those prioritizing Calcium intake, but additional Vitamin D may be required for comprehensive support.
About This Product
Calcium 500 mg Plus Vitamin D by Sundown Naturals is a joint & bone supplement containing 2 active ingredients. It has earned an N+ Score of 55/100 (Grade F).
Notable clinical-dose ingredients include Calcium.
N+ Score Breakdown
Are key ingredients present at clinically effective doses based on research?
Does the product include all expected ingredients for its supplement category?
Are individual ingredient amounts clearly disclosed without proprietary blends?
Does the formula include a breadth of beneficial compounds from multiple pathways?
Strengths
- +Fully transparent label with individual ingredient amounts disclosed
- +1 ingredient(s) at clinical dose levels
Weaknesses
- −Missing several expected ingredients for its category
Ingredient Analysis (2 ingredients)
| Ingredient | Amount | Dose Adequacy |
|---|---|---|
| Vitamin D | 125.000 IU | Under |
| Calcium | 500.000 mg | Optimal |
Clinical ranges based on NIH ODS Fact Sheets and peer-reviewed research. Status indicates whether the amount meets evidence-based thresholds.





