| 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 D | 7.5 mcg | 38% |
| Calcium | 98 mg | 8% |
| Zinc | 3 mg | 27% |
| Chromium | 100 mcg | 286% |
| Reducose Mulberry extract | 250 mg | — |
| Cinnamon bark extract | 150 mg | — |
| Alpha-Lipoic Acid | 100 mg | — |
| Bitter Melon powder | 100 mg | — |
| Gymnema sylvestre leaf extract | 100 mg | — |
| Vanadium | 25 mcg | — |
Other ingredients: Tricalcium Phosphate, Microcrystalline Cellulose, Croscarmellose Sodium, Magnesium Stearate, Calcium Silicate, Silicon Dioxide, Guar Gum, Hydroxypropyl Methylcellulose, Vegetable Acetoglycerides, Polyethylene Glycol, Carnauba wax, Polysorbate 80, Titanium Dioxide, Caramel color, Talc
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
Same category, higher SupplementScore. Based on dosage transparency, label cleanliness, and formula quality.
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.
Zinc is a cofactor for over 300 enzymes involved in immune cell development and function. Supplementation may reduce duration of common cold symptoms, particularly as lozenges. Essential for maintaining immune barrier integrity.
Essential for skin integrity and wound repair processes.
Primary structural component of bones. Adequate lifelong intake, combined with vitamin D, helps prevent osteoporosis — supported by extensive clinical evidence.
Essential for muscle contraction through calcium signaling.
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.
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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 GNC Preventive Nutrition. If you represent this brand and believe any information is inaccurate, please contact us for a correction. Read full methodology
Alternatives are selected from the same category (Vitamin D) with a higher overall score. This is not a recommendation — always verify ingredients and dosages match your needs.
Some association between low vitamin D levels and depression, but evidence is inconsistent.