Vitamin D
USANA Vitamin D is a vitamin supplement containing two active ingredients: Vitamin D3 (50 mcg) and Vitamin K (30 mcg) per tablet. This product received an N+ Score of 41, resulting in an 'F' grade, which denotes a below-average quality evaluation. While the label transparency is excellent at 100%, neither Vitamin D3 nor Vitamin K are present at dosages considered clinically optimal for broad support, with both listed as underdosed in the analysis. Research suggests Vitamin D may support bone health and immune function, and Vitamin K may support bone and cardiovascular health. This supplement could be considered by those looking for a foundational vitamin D source, but higher doses may be required for specific needs.
About This Product
Vitamin D by USANA is a vitamins & minerals supplement containing 2 active ingredients. It has earned an N+ Score of 41/100 (Grade F).
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
Weaknesses
- −Several ingredients below clinically effective doses
Ingredient Analysis (2 ingredients)
| Ingredient | Amount | Dose Adequacy |
|---|---|---|
| Vitamin K | 30.000 mcg | Under |
| Vitamin D3 | 50.000 mcg | Under |
Clinical ranges based on NIH ODS Fact Sheets and peer-reviewed research. Status indicates whether the amount meets evidence-based thresholds.