---
product_id: 9230173
title: "21st Century Niacinamide 500 mg Prolonged Release Tablets, 110 Count"
brand: "21st century"
price: "196 DH"
currency: MAD
in_stock: true
reviews_count: 13
category: "21st Century"
url: https://www.desertcart.ma/products/9230173-21st-century-niacinamide-500-mg-prolonged-release-tablets-110-count
store_origin: MA
region: Morocco
---

# 500mg prolonged release Vegan & Non-GMO purity No sugar, salt, preservatives 21st Century Niacinamide 500 mg Prolonged Release Tablets, 110 Count

**Brand:** 21st century
**Price:** 196 DH
**Availability:** ✅ In Stock

## Summary

> ⏳ Elevate your energy & wellness game with slow-release niacinamide power!

## Quick Answers

- **What is this?** 21st Century Niacinamide 500 mg Prolonged Release Tablets, 110 Count by 21st century
- **How much does it cost?** 196 DH with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ma](https://www.desertcart.ma/products/9230173-21st-century-niacinamide-500-mg-prolonged-release-tablets-110-count)

## 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

- • **Gentle on Your System:** Niacinamide delivers vitamin B3 benefits without the flushing effect of traditional niacin
- • **Sustained Energy Boost:** 500mg niacinamide with prolonged release for steady metabolism support all day
- • **Flexible Dosage Control:** 500mg tablets easily split for personalized dosing—perfect for fine-tuning your wellness routine
- • **Clean & Conscious Formula:** Free from sugar, salt, yeast, preservatives, artificial flavors/colors, gluten-free and vegan-friendly
- • **Trusted Quality Assurance:** Manufactured in cGMP-certified facility with 30+ years of purity and potency guarantee

## Overview

21st Century Niacinamide 500 mg Prolonged Release Tablets provide a clean, vegan, and non-GMO source of vitamin B3 designed for steady nutrient release. Manufactured under strict quality standards, these tablets support energy metabolism and skin, nerve, and digestive health without the flushing side effects of regular niacin. With no added sugars, preservatives, or artificial ingredients, this trusted supplement offers flexible dosing and a purity guarantee, making it a top choice for health-conscious professionals seeking sustained vitality.

## Description

Vitamin B-3 plays a key role in converting food into energy and helps maintain the normal function of nerves, skin, and the digestive system. Niacinamide is a good source of vitamin B-3 without the flushing effect associated with niacin. Unconditionally guaranteed for purity, freshness and label potency. No added Sugar, Salt, Yeast, Preservatives, Artificial Flavors or Colors. 21st Century Vitamins and Supplements are manufactured in a cGMP facility under the strictest standards for product quality, including potency and purity. 21st Century prides itself on providing you with a great product at the best value. 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.

Review: Very very very good. - The first day I took this I got a lot of energy for about an hour then I seemed to have sort of "crashed". But that was only the first day. Since then I've taken it every morning and it's been incredible. I have more energy and my joints don't hurt. I'd say I'm even in a better mood because of it. I highly recommend it.
Review: time-release Niacinamie + time-release melatonin... Great sleep FINALLY! - So, wow. Fellow strugglers of proper sleep: perhaps you got to here after learning about the "Healthy Sleep Formula" created by Steve Gibson, as I did. If not, and sleep is an issue for you, I highly recommend you google "Healthy sleep formula" to get to the page on grc .com. That guy has a HUGE following. So much so that when he developed his version 2.0 of the sleep formula and recommend a specific brand of Niacinamide, it sold out everywhere. I knew right then that there must be something to this formula of his. Then he popped back with an update stating that this brand was officially recommended after it had been tested out. I would have never thought that Niacinamide (the amide of nicotinic acid (vitamin B3 / niacin)) + melatonin could be such a magic sleep cocktail. And trust me, at this point I have tried a lot of different supplements. I suffer from the kind of insomnia where you can easily go to sleep, but not remain asleep (sleep-maintaining insomnia disorder)... tossing and turning, rarely getting into deep sleep/REM and waking up everyday feeling pretty exhausted. What a waste of time, honestly. I have been on a long road of finding ways to improve this issue through healthy means, trying my best to avoid actual sleeping pills. Things would work for a bit... then no longer be effective and it would be this endless chase for the next sleep fix. But this formula offered me something new: a combination of 2 time-release pills taken together. It addressed my exact needs. And I am here to say, it works. It WORKS LONG-TERM. I have been doing this formula of time-release Nicinamide and time-release melatonin for several weeks now and its amazing the energy I have now. Many days I wake up about 10-15 minutes before my scheduled alarm for work, have much more vivid dreams, have no issue getting out of bed and out the door, actually feel like going to the gym on my lunch break instead of taking a car nap...it's put me on a great healthy schedule overall and feeling top of my game. I actually look forward to bedtime now. If you do Steve's formula, you have to figure out what is best for you. I will state that I am not a sensitive person and typically need higher dosages of things. In my experimenting I have found that 1250mg of Niacinamide + the 1mg melatonin works best for me to sleep through the night without crossing over into groggy-ville. It is one reason why I like this brand being a lower dosage of 500mg, so I can easily up 1/2 and full dosages cutting the pills. It was very much a goldilocks situation... 1 is too little... 2 is too little... 3 IS TOO MUCH IM IN A HAZE... 2.5 is just right :D So thats my story of Niacinamide and how it's solved my sleep-maintaining insomnia. Pretty amazing, I can't fully believe it yet. Just in case you are wondering the breadcrumb trail of how I got here... it went: friend told me about GABA... and combining with taurine to be more effective. I researched GABA and stumbled on a "sleep hacking through biochemistry" blog... read about all these things to help get you into sleep faster and more lasting, and replacing 5-HTP with tryptophan (but it mentioning a high tryptophan diet might not be healthy so being careful not to use constantly)...blah blah read some reviews on the tryptophan I was getting and mentioning Steve Gibson's healthy sleep formula. His 1st generation formula used a handful of all those aforementioned things till he developed the 2nd gen one. Glad I jumped on board after that point! Its cheap and super effective.

## Features

- Niacin (vitamin B-3) plays a role in energy metabolism.* Niacinamide is a good source of vitamin B-3 with a lower flushing effect than that of niacin.*
- Prolonged release vitamins slowly release nutrients into the body over an extended period of time.
- No added Sugar, Salt, Yeast, Preservatives, Artificial Flavors or Colors. Gluten Free. Suitable for Vegans. Non-GMO.
- 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.
- For over 30 years, 21st Century HealthCare has been dedicated to manufacturing only the highest quality vitamins and supplements in Tempe, Arizona.
- These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B004SCKMQS |
| Best Sellers Rank | #7,279 in Health & Household ( See Top 100 in Health & Household ) #10 in Vitamin B3 (Niacin) Supplements #838 in Sales & Deals |
| Customer Reviews | 4.6 4.6 out of 5 stars (5,240) |
| Date First Available  | February 3, 2010 |
| Is Discontinued By Manufacturer  | No |
| Item model number  | 22550 |
| Manufacturer  | 21st Century |
| Product Dimensions  | 2 x 3 x 4 inches; 0.02 ounces |

## Product Details

- **Brand:** 21st Century
- **Diet Type:** Vegan
- **Flavor:** Unflavored
- **Item Form:** Tablet
- **Primary Supplement Type:** Vitamin-b

## Images

![21st Century Niacinamide 500 mg Prolonged Release Tablets, 110 Count - Image 1](https://m.media-amazon.com/images/I/61uohfvrRiL.jpg)

## Available Options

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

## Questions & Answers

**Q: Are they actually made right in Tempe AZ**
A: Yeap

**Q: What is the size of these tablets?**
A: the size of the cathedral door

**Q: why there is Niacin and Niacinamide of the B3, what is the difference**
A: Niacin has more uses and positive effects but can cause flushing. Niacinamide doesn't have as many positive effects but will not cause flushing.

**Q: Why did the manufacturer make these with talc? it says <2%, but if one takes this every day it adds up!**
A: I am not sure. I have not purchased this product since adding PEG to the additional ingredients. Search for a manufacturer that makes niacinamide with as little 'bad' ingredients as possible.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Very very very good.
*by S***T on December 8, 2025*

The first day I took this I got a lot of energy for about an hour then I seemed to have sort of "crashed". But that was only the first day. Since then I've taken it every morning and it's been incredible. I have more energy and my joints don't hurt. I'd say I'm even in a better mood because of it. I highly recommend it.

### ⭐⭐⭐⭐⭐ time-release Niacinamie + time-release melatonin... Great sleep FINALLY!
*by H***R on October 20, 2016*

So, wow. Fellow strugglers of proper sleep: perhaps you got to here after learning about the "Healthy Sleep Formula" created by Steve Gibson, as I did. If not, and sleep is an issue for you, I highly recommend you google "Healthy sleep formula" to get to the page on grc .com. That guy has a HUGE following. So much so that when he developed his version 2.0 of the sleep formula and recommend a specific brand of Niacinamide, it sold out everywhere. I knew right then that there must be something to this formula of his. Then he popped back with an update stating that this brand was officially recommended after it had been tested out. I would have never thought that Niacinamide (the amide of nicotinic acid (vitamin B3 / niacin)) + melatonin could be such a magic sleep cocktail. And trust me, at this point I have tried a lot of different supplements. I suffer from the kind of insomnia where you can easily go to sleep, but not remain asleep (sleep-maintaining insomnia disorder)... tossing and turning, rarely getting into deep sleep/REM and waking up everyday feeling pretty exhausted. What a waste of time, honestly. I have been on a long road of finding ways to improve this issue through healthy means, trying my best to avoid actual sleeping pills. Things would work for a bit... then no longer be effective and it would be this endless chase for the next sleep fix. But this formula offered me something new: a combination of 2 time-release pills taken together. It addressed my exact needs. And I am here to say, it works. It WORKS LONG-TERM. I have been doing this formula of time-release Nicinamide and time-release melatonin for several weeks now and its amazing the energy I have now. Many days I wake up about 10-15 minutes before my scheduled alarm for work, have much more vivid dreams, have no issue getting out of bed and out the door, actually feel like going to the gym on my lunch break instead of taking a car nap...it's put me on a great healthy schedule overall and feeling top of my game. I actually look forward to bedtime now. If you do Steve's formula, you have to figure out what is best for you. I will state that I am not a sensitive person and typically need higher dosages of things. In my experimenting I have found that 1250mg of Niacinamide + the 1mg melatonin works best for me to sleep through the night without crossing over into groggy-ville. It is one reason why I like this brand being a lower dosage of 500mg, so I can easily up 1/2 and full dosages cutting the pills. It was very much a goldilocks situation... 1 is too little... 2 is too little... 3 IS TOO MUCH IM IN A HAZE... 2.5 is just right :D So thats my story of Niacinamide and how it's solved my sleep-maintaining insomnia. Pretty amazing, I can't fully believe it yet. Just in case you are wondering the breadcrumb trail of how I got here... it went: friend told me about GABA... and combining with taurine to be more effective. I researched GABA and stumbled on a "sleep hacking through biochemistry" blog... read about all these things to help get you into sleep faster and more lasting, and replacing 5-HTP with tryptophan (but it mentioning a high tryptophan diet might not be healthy so being careful not to use constantly)...blah blah read some reviews on the tryptophan I was getting and mentioning Steve Gibson's healthy sleep formula. His 1st generation formula used a handful of all those aforementioned things till he developed the 2nd gen one. Glad I jumped on board after that point! Its cheap and super effective.

### ⭐⭐⭐⭐⭐ For my Needs it's Priced Right, Works, and Provides some Peace of Mind.
*by P***1 on December 1, 2025*

Inexpensive, pill isn't too big to be inconvenient to swallow (unless you really require a small pill). Took this instead of the extremely expensive prescription drug my doctor recommended, and while it only provides about 1/6th the benefit (based on actual bloodwork by my doctor) it provides it at 1.5% of the cost while giving me some peace of mind.

## Frequently Bought Together

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*Product available on Desertcart Morocco*
*Store origin: MA*
*Last updated: 2026-02-15*