Oyster Shell Calcium 500 mg with Vitamin D
Major Oyster Shell Calcium with Vitamin D is a single vitamin and mineral supplement designed to support bone health. This product contains 500mg of Calcium, which is provided at a clinically studied dose, and 200 IU of Vitamin D3, which research suggests is underdosed for optimal support. With a total of two ingredients and 100% label transparency, the product's N+ Score is 55, earning it an 'F' grade, indicating significant areas for improvement, particularly in formula completeness and ingredient adequacy. This product may be suitable for individuals seeking a basic calcium supplement, though the low Vitamin D3 dosage might necessitate additional supplementation. The low N+ Score suggests it may not be the most comprehensive option available.
About This Product
Oyster Shell Calcium 500 mg with Vitamin D by Major 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 |
|---|---|---|
| Calcium | 500.000 mg | Optimal |
| Vitamin D3 | 200.000 IU | Under |
Clinical ranges based on NIH ODS Fact Sheets and peer-reviewed research. Status indicates whether the amount meets evidence-based thresholds.