| 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. |
|---|---|---|
| Calories | 5 Calorie(s) | — |
| Total Carbohydrates | 1 Gram(s) | 1% |
| Vitamin C | 500 mg | 833% |
| Polygonum cuspidatum root extract | 200 mg | — |
| Green Tea Leaf Extract | 150 mg | — |
| Grape seed extract | 150 mg | — |
| Turmeric | 100 mg | — |
| Rosemary leaf extract | 100 mg | — |
| Lecithin | 100 mg | — |
| Bromelain | 100 mg | — |
| Quercetin | 100 mg | — |
| Ginkgo leaf extract | 60 mg | — |
| Rutin | 60 mg | — |
| Pycnogenol | 50 mg | — |
| Silymarin | 50 mg | — |
| Bioperine | 6 mg | — |
| Hawthorn berry extract | 50 mg | — |
| Citrus Bioflavonoid Complex | 50 mg | — |
| Astragalus root extract | 50 mg | — |
| Cranberry | 50 mg | — |
| Sweet Cherry Fruit Extract | 50 mg | — |
| Holy Basil leaf extract | 50 mg | — |
| Olive Leaf Extract | 40 mg | — |
| Lycium fruit extract | 40 mg | — |
| Strawberry | 40 mg | — |
| Acai fruit extract | 40 mg | — |
| Amla | 40 mg | — |
| Pomegranate fruit extract | 20 mg | — |
| Elderberry fruit extract | 20 mg | — |
| Mangosteen fruit rind Extract | 10 mg | — |
| Red Raspberry Leaf Extract | 10 mg | — |
| Bilberry Fruit Extract | 5 mg | — |
Other ingredients: Silicified Microcrystaline Cellulose, Stearic Acid, modified Cellulose Gum, Silica
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.
Supports immune cell function. Regular supplementation may modestly reduce cold duration, but does not prevent colds.
Potent water-soluble antioxidant that protects cells from oxidative damage.
Essential cofactor for enzymes involved in collagen production.
Curcumin has anti-inflammatory properties in clinical studies, though bioavailability is low without enhanced formulations (piperine, liposomal, etc.).
Curcumin may reduce joint pain and inflammation in osteoarthritis. Effects depend on bioavailability — enhanced forms (BCM-95, Meriva, piperine) show better results than standard curcumin.
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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 Source Naturals. 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 C) with a higher overall score. This is not a recommendation — always verify ingredients and dosages match your needs.
No FDA warnings or recalls on file.