---
product_id: 16943403
title: "21st Century Vitamin C 500mg Prolonged Release Tablets, Immune, 110ct"
brand: "21st century"
price: "¥2855"
currency: JPY
in_stock: true
category: "21st Century"
url: https://www.desertcart.jp/products/16943403-21st-century-vitamin-c-500mg-prolonged-release-tablets-immune-110ct
store_origin: JP
region: Japan
---

# 500mg prolonged release Gluten-free, vegan, no additives Powerful antioxidant immune support 21st Century Vitamin C 500mg Prolonged Release Tablets, Immune, 110ct

**Brand:** 21st century
**Price:** ¥2855
**Availability:** ✅ In Stock

## Summary

> 🛡️ Stay unstoppable with steady Vitamin C power all day long!

## Quick Answers

- **What is this?** 21st Century Vitamin C 500mg Prolonged Release Tablets, Immune, 110ct by 21st century
- **How much does it cost?** ¥2855 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/16943403-21st-century-vitamin-c-500mg-prolonged-release-tablets-immune-110ct)

## Best For

- 21st century enthusiasts

## Why This Product

- Trusted 21st century brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Powerhouse:** 110 tablets in a sleek bottle, perfect for your busy lifestyle and wellness routine.
- • **Pure & Clean Formula:** No sugar, salt, yeast, preservatives, or artificial flavors—just what your body needs.
- • **All-Day Immune Defense:** Slow-release Vitamin C keeps you protected from sunrise to sunset.
- • **Trusted Quality Assurance:** Over 30 years of expert manufacturing guarantees potency and safety.
- • **Vegan & Gluten-Free Friendly:** Designed for the mindful professional who values clean, inclusive nutrition.

## Overview

21st Century Vitamin C 500mg Prolonged Release Tablets deliver a steady, all-day supply of immune-boosting antioxidant support. With a clean, vegan-friendly formula free from gluten, sugar, and artificial additives, these 110 tablets are crafted by trusted experts with over 30 years of quality assurance. Perfect for professionals seeking reliable, long-lasting wellness in a compact, convenient form.

## Description

21st Century's prolonged release Vitamin C-500 provides long-term vitamin supplementation by slowly releasing nutrients to the body over an extended period of time. Vitamin C is an important antioxidant nutrient that helps neutralize free radicals and support a healthy immune system.

## Features

- ANTIOXIDANT AND IMMUNE SUPPORT: Vitamin C is an important antioxidant nutrient that supports the immune system
- PROLONGED RELEASE: Prolonged release vitamins slowly release nutrients into the body over an extended period of time
- NO ADDED: No added Sugar, Salt, Yeast, Preservatives or Artificial Flavors. Gluten Free. Suitable for Vegans. Non-GMO
- GUARANTEED QUALITY: 21st Century HealthCare manufactures over 500 vitamins and nutritional supplements that are trusted to be 100% safe, contain the purest ingredients and are guaranteed for label potency
- TRUSTED EXPERTS: For over 30 years, 21st Century HealthCare has been dedicated to manufacturing only the highest quality vitamins and supplements in Tempe, Arizona.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00166U2UA |
| ASIN  | B00166U2UA |
| Age Range Description | Adult |
| Allergen Information | Gluten Free |
| Best Sellers Rank | #58,369 in Health & Household ( See Top 100 in Health & Household ) #342 in Vitamin C Supplements |
| Brand Name | 21st Century |
| Color | No Color |
| Container Type | Bottle |
| Customer Reviews | 4.6 4.6 out of 5 stars (397) |
| 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 Highlight | Vitamin C 500 mg Time-Release Tablets, Immune & Antioxidant Support, Steady All-Day Release, Gluten Free |
| 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 |

## Product Details

- **Brand:** 21st Century
- **Diet Type:** Gluten Free
- **Flavor:** Unflavored
- **Item Form:** Tablet
- **Primary Supplement Type:** Vitamin C

## Images

![21st Century Vitamin C 500mg Prolonged Release Tablets, Immune, 110ct - Image 1](https://m.media-amazon.com/images/I/61vgjRBMEeL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Does it contain soy**
A: I checked the label and it doesn't. list 'soy' as such.

**Q: Are these coated?**
A: I don't take them anymore but I think they are a smooth tablet.

**Q: I wanted the chewable tablets like it says on the description but I got the prolong lease like in the picture. Do you have the chewable ?**
A: I have chewables

**Q: Does anyone know the sugar content of these chewables? This is a factor for diabetics**
A: the sugar content is not written on the bottle.  I think you will have to go to the manufacturer for this information.

## Frequently Bought Together

- 21st Century C 500 mg Prolonged Release Tablets, 110 Count (21190)
- 21st Century Slow Release Iron Tablets, 60 Count
- 21st Century B 50 Complex Prolonged Release Tablets, 60 Count (Pack of 1)

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**Shop now:** [https://www.desertcart.jp/products/16943403-21st-century-vitamin-c-500mg-prolonged-release-tablets-immune-110ct](https://www.desertcart.jp/products/16943403-21st-century-vitamin-c-500mg-prolonged-release-tablets-immune-110ct)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-09-11*