One Daily Maximum
21st Century One Daily Maximum is a comprehensive multivitamin containing 31 ingredients designed to provide broad nutritional support. This product achieved an N+ Score of 73 and a C+ grade, indicating a good level of transparency (100%) but mixed ingredient adequacy. Key vitamins such as Vitamin A (750mcg), Vitamin C (60mg), Vitamin E (14mg), Thiamine (1.5mg), and Riboflavin (1.7mg) are present at clinically studied dosages. However, several important nutrients, including Vitamin D3, Vitamin K, and Calcium, are underdosed compared to established recommendations. This multivitamin may be appropriate for individuals seeking a foundational supplement, but may require additional supplementation for certain nutrients.
About This Product
One Daily Maximum by 21st Century is a collagen & beauty supplement containing 31 active ingredients. It has earned an N+ Score of 73/100 (Grade C+).
Notable clinical-dose ingredients include Thiamine, Riboflavin, Niacin and 17 more.
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
- +Broad ingredient diversity exceeding category norms
- +20 ingredient(s) at clinical dose levels
- +Rich formula with 31 active ingredients
Weaknesses
- −Missing several expected ingredients for its category
Ingredient Analysis (31 ingredients)
| Ingredient | Amount | Dose Adequacy |
|---|---|---|
| Vitamin K | 25.000 mcg | Under |
| Thiamine | 1.500 mg | Optimal |
| Riboflavin | 1.700 mg | Optimal |
| Niacin | 20.000 mg | Optimal |
| Vitamin B6 | 2.000 mg | Optimal |
| Folate | 667.000 mcg DFE | Optimal |
| Vitamin B12 | 6.000 mcg | Optimal |
| Biotin | 30.000 mcg | Optimal |
| Pantothenic Acid | 10.000 mg | Optimal |
| Vitamin A | 750.000 mcg | Optimal |
| Vitamin C | 60.000 mg | Adequate |
| Vitamin E | 14.000 mg | Adequate |
| Calcium | 162.000 mg | Under |
| Iron | 18.000 mg | Optimal |
| Iodine | 150.000 mcg | Optimal |
| Magnesium | 100.000 mg | Adequate |
| Zinc | 15.000 mg | Optimal |
| Selenium | 20.000 mcg | Adequate |
| Copper | 2.000 mg | Optimal |
| Manganese | 3.500 mg | Optimal |
| Chromium | 65.000 mcg | Optimal |
| Boron | 150.000 mcg | N/A |
| Potassium | 80.000 mg | Under |
| Vitamin D3 | 10.000 mcg | Under |
| Molybdenum | 160.000 mcg | Optimal |
| Phosphorus | 109.000 mg | Under |
| Vanadium | 10.000 mcg | N/A |
| Silicon | 2.000 mg | N/A |
| Chloride | 72.000 mg | Under |
| Nickel | 5.000 mcg | N/A |
| Tin | 10.000 mcg | N/A |
Clinical ranges based on NIH ODS Fact Sheets and peer-reviewed research. Status indicates whether the amount meets evidence-based thresholds.