---
product_id: 31945663
title: "Niacin 500 mg Prolonged Release Tablets, 100 Count (27474)"
brand: "21st century"
price: "R$145"
currency: BRL
in_stock: true
reviews_count: 8
category: "21st Century"
url: https://www.desertcart.com.br/products/31945663-niacin-500-mg-prolonged-release-tablets-100-count-27474
store_origin: BR
region: Brazil
---

# Supports energy metabolism No added sugar, salt, yeast, preservatives 500 mg prolonged release niacin Niacin 500 mg Prolonged Release Tablets, 100 Count (27474)

**Brand:** 21st century
**Price:** R$145
**Availability:** ✅ In Stock

## Summary

> 💥 Unlock steady energy and clean wellness with every tablet!

## Quick Answers

- **What is this?** Niacin 500 mg Prolonged Release Tablets, 100 Count (27474) by 21st century
- **How much does it cost?** R$145 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/31945663-niacin-500-mg-prolonged-release-tablets-100-count-27474)

## 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

- • **Clean & Pure Formula:** Free from sugar, salt, yeast, preservatives, artificial flavors, and colors—because your body deserves the best.
- • **Nerve & Skin Support:** Promotes healthy nervous and digestive system function while enhancing skin wellness.
- • **Sustained Energy Boost:** 500 mg prolonged release niacin ensures steady vitamin B3 delivery for all-day vitality.
- • **Trusted Quality & Value:** Consistently high-quality, gluten-free tablets with 4.5-star reviews and a loyal millennial following.
- • **Gut-Friendly & Easy to Digest:** Flush-free, slow-release tablets designed for gentle absorption and minimal discomfort.

## Overview

21st Century Niacin 500 mg Prolonged Release Tablets deliver a slow-release form of vitamin B3 designed to support energy metabolism, nervous system health, and skin function. With no added sugars, salts, yeast, preservatives, or artificial additives, these gluten-free tablets offer a clean, easy-to-digest supplement option trusted by thousands of adults seeking consistent quality and value.

## Description

Compare to active ingredient in Slo Niacin. Niacin (Vitamin B-3) plays a key role in converting food into energy. It also helps maintain health function of the nervous and digestive systems and the skin. No added sugar, salt, yeast, preservatives, artificial flavors or colors. 21st Century offers the highest quality ingredients produced to strict standards of quality for your good health. This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.Slo Niacin is a registered trademark of Upsher-Smith Laboratories, Maple Grove, MN 55369

Review: Good value that is easy to digest - Consistent quality and easily digested. Flush free and slow release formula is easy to swallow and meets Dr.’s requirements.
Review: Good - I can't swallow big capsules & I couldn't find anything but capsules in the stores where I live so I ordered these. I can cut them up to take. I do get some flushing & a little itch but not too bad. I don't mind as it shows me it's working. The price is right for what you get & quality seems to be there consistently. Will definitely buy again.

## Features

- Allergen information: mustard_free
- Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery
- Compare to active ingredient in slo niacin
- No added sugar, salt, yeast, preservatives, artificial flavors or colors
- This product is not intended to diagnose, treat, cure or prevent any disease.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00HND5U3Y |
| Age Range Description | Adult |
| Allergen Information | Gluten Free |
| Best Sellers Rank | #52,559 in Health & Household ( See Top 100 in Health & Household ) #88 in Vitamin B3 (Niacin) Supplements |
| Brand | 21st Century |
| Brand Name | 21st Century |
| Color | No Color |
| Customer Reviews | 4.5 out of 5 stars 816 Reviews |
| Diet Type | Gluten Free |
| Dosage Form | Tablet |
| Flavor | Unflavored |
| Global Trade Identification Number | 00740985274743 |
| Item Dimensions | 1.75 x 2.38 x 3.75 inches |
| Item Form | Tablet |
| Item Weight | 0.21 Pounds |
| Manufacturer | 21st Century |
| Model Name | See packaging |
| Number of Items | 1 |
| Primary Supplement Type | Vitamin B3 |
| Product Benefits | Energy Management |
| Specific Uses For Product | Nerve |
| UPC | 740985274743 |
| Unit Count | 100 Count |

## Product Details

- **Brand:** 21st Century
- **Diet Type:** Gluten Free
- **Flavor:** Unflavored
- **Item Form:** Tablet
- **Primary Supplement Type:** Vitamin B3

## Images

![Niacin 500 mg Prolonged Release Tablets, 100 Count (27474) - Image 1](https://m.media-amazon.com/images/I/617LlVeUQJL.jpg)
![Niacin 500 mg Prolonged Release Tablets, 100 Count (27474) - Image 2](https://m.media-amazon.com/images/I/61QeELoKDcL.jpg)
![Niacin 500 mg Prolonged Release Tablets, 100 Count (27474) - Image 3](https://m.media-amazon.com/images/I/61aFturOFNL.jpg)
![Niacin 500 mg Prolonged Release Tablets, 100 Count (27474) - Image 4](https://m.media-amazon.com/images/I/712iSiNqsAL.jpg)
![Niacin 500 mg Prolonged Release Tablets, 100 Count (27474) - Image 5](https://m.media-amazon.com/images/I/71A85+dBNsL.jpg)

## Available Options

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

## Questions & Answers

**Q: How big are the tablets?**
A: A bit smaller than a multivitamin and vitamin c tablets.

**Q: Your product contains two of the chemicals that are derived from the east palestine  train derailment: polyvinyl alcohol, polyethylene glycol.plastic?**
A: Yes it is flush free for me most of the time.

**Q: I have taken this up to 1500 with no effect at all.Any idea??**
A: You should not get a niacin flush taking the slow release version.

**Q: Is this niacinamide or nicotinic acid?**
A: Nicotinic acid, but, you will not get a flush from this product if, you consume with food. I hope this helps.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good value that is easy to digest
*by C***A on September 27, 2025*

Consistent quality and easily digested. Flush free and slow release formula is easy to swallow and meets Dr.’s requirements.

### ⭐⭐⭐⭐⭐ Good
*by A***R on March 23, 2024*

I can't swallow big capsules & I couldn't find anything but capsules in the stores where I live so I ordered these. I can cut them up to take. I do get some flushing & a little itch but not too bad. I don't mind as it shows me it's working. The price is right for what you get & quality seems to be there consistently. Will definitely buy again.

### ⭐⭐⭐⭐⭐ Great product
*by C***L on July 1, 2025*

In 3 months it lower my Triglycerides from 503 to 346 🤗 worth it

## Frequently Bought Together

- 21st Century Niacin 500 mg Prolonged Release Tablets, 100 Count (27474)
- Viva Doria Virgin Activated Charcoal Powder, Hardwood Derived, Food Grade, 16 Oz (1 Pound)
- 21st Century Niacinamide 500 mg Prolonged Release Tablets, 110 Count

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**Shop now:** [https://www.desertcart.com.br/products/31945663-niacin-500-mg-prolonged-release-tablets-100-count-27474](https://www.desertcart.com.br/products/31945663-niacin-500-mg-prolonged-release-tablets-100-count-27474)

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-01-26*