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| Ingredient | Amount | % DV% Daily Value - how much of the recommended daily intake one serving provides, based on a 2,000 calorie diet. 100% = full daily need. Values over 100% are common for water-soluble vitamins (B, C) and generally safe. Values over 200% are highlighted. |
|---|---|---|
| Vitamin D3 | 10 mcg | 50% |
Other ingredients: Sorbitol, Sucrose, Mannitol, Cellulose, Citric Acid, Crospovidone, Hydroxypropyl Methylcellulose, Silicon Dioxide, Contains Less Than 2% of
All scores are algorithmically generated from publicly available label data (NIH Dietary Supplement Label Database) and reflect label quality, not clinical efficacy, safety, or product quality. This page is not affiliated with or endorsed by 21st Century. If you represent this brand and believe any information is inaccurate, please contact us for a correction. Read full methodology
This score evaluates label quality - dosage disclosure, transparency, cleanliness of inactive ingredients, and formula composition. It does not measure clinical efficacy, bioavailability, or third-party testing. Read full methodology
Products with overlapping ingredients and a higher SupplementScore. Based on dosage transparency, label cleanliness, and formula quality.
Alternatives share ingredients with this product (or come from its category, Vitamin D) and have a higher overall score. This is not a recommendation - always verify ingredients and dosages match your needs.
The research summaries below are about the ingredients in general, drawn from published studies that often use different doses, forms, and populations than this product. A "strong" evidence rating for an ingredient does not mean this product will produce that effect - studied doses may be significantly higher or lower than what is contained here. Always verify doses against the Supplement Facts table above.
Essential for calcium absorption. Deficiency leads to rickets in children and osteomalacia in adults - a well-established causal relationship.
May reduce risk of respiratory infections. Active area of research.
Some association between low vitamin D levels and depression, but evidence is inconsistent.
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