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🛡️ Stay ahead, stay strong — your immune system’s all-day bodyguard!
21st Century Vitamin C 500mg Prolonged Release Tablets deliver a steady, all-day supply of immune-boosting antioxidant support in a clean, vegan, and gluten-free formula trusted for over 30 years. Each bottle contains 110 tablets designed for adults seeking reliable, high-quality vitamin C supplementation without additives.













| ASIN | B00166U2UA |
| ASIN | B00166U2UA |
| Age Range Description | Adult |
| Allergen Information | Gluten Free |
| Best Sellers Rank | #59,964 in Health & Household ( See Top 100 in Health & Household ) #340 in Vitamin C Supplements |
| Brand Name | 21st Century |
| Color | No Color |
| Container Type | Bottle |
| Customer Reviews | 4.6 4.6 out of 5 stars (391) |
| Date First Available | May 7, 2005 |
| Diet Type | Gluten Free |
| Dosage Form | 500 |
| Flavor | Unflavored |
| Global Trade Identification Number | 00740985211908 |
| Item Dimensions | 2.38 x 1.75 x 3.75 inches |
| Item Form | Tablet |
| Item Weight | 4.16 ounces |
| Item model number | 21190 |
| Manufacturer | 21st Century |
| Manufacturer | 21st Century |
| Manufacturer Part Number | 21190 |
| Material Type Free | Gluten Free |
| Model Name | ury C 500 mg Prolonged Release Tablets, 110 Count (21190) |
| Model Number | 21190 |
| Number of Items | 1 |
| Primary Supplement Type | Vitamin C |
| Product Benefits | Immune Support |
| Product Dimensions | 2.38 x 1.75 x 3.75 inches; 4.15 ounces |
| Specific Uses For Product | Antioxidant, Immunity |
| UPC | 740985211908 |
| Unit Count | 110 Count |
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