---
product_id: 251311045
title: "C-500 Mg Prolonged Release - 110 Tablet"
brand: "21st century"
price: "$44.70"
currency: USD
in_stock: true
reviews_count: 8
category: "21st Century"
url: https://www.desertcart.ec/products/251311045-c-500-mg-prolonged-release-110-tablet
store_origin: EC
region: Ecuador
---

# Prolonged release for all-day support Free from gluten, sugar, preservatives 500mg Vitamin C power C-500 Mg Prolonged Release - 110 Tablet

**Brand:** 21st century
**Price:** $44.70
**Availability:** ✅ In Stock

## Summary

> 🛡️ Stay ahead, stay healthy—Vitamin C that works as hard as you do!

## Quick Answers

- **What is this?** C-500 Mg Prolonged Release - 110 Tablet by 21st century
- **How much does it cost?** $44.70 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/251311045-c-500-mg-prolonged-release-110-tablet)

## 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

- • **Pure & Clean Boost:** No added sugar, salt, yeast, preservatives, artificial flavors or colors—just pure Vitamin C
- • **Gluten-Free Wellness:** Safe and effective for gluten-sensitive professionals prioritizing clean nutrition
- • **Immune Shield All Day:** Slow-release formula keeps your defenses strong from morning to night
- • **Generous 110-Count Supply:** Long-lasting bottle designed to keep you stocked and stress-free
- • **Trusted Quality, Proven Results:** Highly rated with 4.3 stars from 1,400+ health-conscious users

## Overview

21st Century C-500 Mg Prolonged Release delivers a potent 500mg dose of Vitamin C in a slow-release tablet form, ensuring steady antioxidant and immune support throughout the day. With 110 tablets per bottle, this gluten-free, additive-free supplement is designed for adults seeking pure, reliable immune defense without compromise.

## Description

Product Description Vitamin C is an important antioxidant nutrient that helps neutralize free radicals and supports the immune system. Prolonged release vitamins slowly release nutrients into the body over an extended period of time. Set Contains: 110 Tablets

Review: Same as described - Good and cheap
Review: Absolutely worth it - Buying it 3rd time

## Features

- Immune System Support.
- Unconditionally ensured for purity, freshness and label potency.
- Free from added Sugar, Salt, Yeast, Preservatives, Artificial Flavours or Colours and Gluten.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00166U2UA |
| Age Range Description | Adult |
| Allergen Information | Gluten Free |
| Best Sellers Rank | #812 in Health ( See Top 100 in Health ) #195 in Vitamin C Supplements |
| Brand | 21st Century |
| Brand Name | 21st Century |
| Color | red |
| Container Type | Bottle |
| Country of Publication | USA |
| Customer Reviews | 4.3 out of 5 stars 1,449 Reviews |
| Diet Type | Gluten Free |
| Diet type | Gluten Free |
| Dosage Form | 500 |
| Flavor | Unflavored |
| Flavour | Unflavored |
| Global Trade Identification Number | 00740985211908 |
| Item Dimensions | 6 x 4.4 x 9.5 centimeters |
| Item Form | Tablet |
| Item Nype Name | HEALTH_PERSONAL_CARE |
| Item Weight | 118 g |
| Item form | Tablet |
| Item height | 3.75 inches |
| Manufacturer | 21st Century |
| Material Type Free | Gluten Free |
| Model Name | ury C 500 mg Prolonged Release Tablets, 110 Count (21190) |
| Number of Items | 1 |
| Primary Supplement Type | Vitamin C |
| Primary supplement type | Vitamin C |
| Product Benefits | Immune Support |
| Product benefits | Immune Support |
| Specific Uses For Product | Antioxidant, Immunity |
| UPC | 740985211908 |
| Unit Count | 110 Count |

## Product Details

- **Brand:** 21st Century
- **Item form:** Tablet
- **Primary supplement type:** Vitamin C
- **Diet type:** Gluten Free
- **Flavour:** Unflavored

## Images

![C-500 Mg Prolonged Release - 110 Tablet - Image 1](https://m.media-amazon.com/images/I/61vgjRBMEeL.jpg)

## Available Options

This product comes in different **Size, Style** 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Same as described
*by V***U on 8 July 2025*

Good and cheap

### ⭐⭐⭐⭐⭐ Absolutely worth it
*by Z***N on 5 January 2026*

Buying it 3rd time

### ⭐⭐⭐⭐ Good
*by S***I on 18 November 2025*

Good

## 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.ec/products/251311045-c-500-mg-prolonged-release-110-tablet](https://www.desertcart.ec/products/251311045-c-500-mg-prolonged-release-110-tablet)

---

*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-01-25*