Vitamin D3 25 mcg (1000 IU)
Natural Factors' Vitamin D3 25 mcg (1000 IU) is a vitamin supplement containing a single ingredient, Vitamin D3. Each tablet delivers 25 mcg (1000 IU) of Vitamin D3. This dosage is generally considered underdosed for many common applications, as research often suggests higher amounts for significant impact on D3 levels. The product received an N+ Score of 40, earning an 'F' grade, indicating it falls into the below-average tier. Despite 100% label transparency, its low ingredient adequacy and formula completeness contribute to its overall low score. This product might be suitable for individuals seeking a very minimal daily Vitamin D3 intake, but may not be effective for addressing deficiencies.
About This Product
Vitamin D3 25 mcg (1000 IU) by Natural Factors is a vitamins & minerals supplement containing 1 active ingredients. It has earned an N+ Score of 40/100 (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
- −Limited ingredient diversity compared to category norms
Ingredient Analysis (1 ingredients)
| Ingredient | Amount | Dose Adequacy |
|---|---|---|
| Vitamin D3 | 25.000 mcg | Under |
Clinical ranges based on NIH ODS Fact Sheets and peer-reviewed research. Status indicates whether the amount meets evidence-based thresholds.