---
product_id: 642991421
title: "NOW Foods Supplements, Niacin (Vitamin B-3) 500 mg, Essential B-Group Vitamin*, Nutritional Health, 100 Capsules"
brand: "now foods"
price: "฿1238"
currency: THB
in_stock: true
reviews_count: 13
category: "Now Foods"
url: https://www.desertcart.co.th/products/642991421-now-foods-supplements-niacin-vitamin-b-3-500-mg-essential
store_origin: TH
region: Thailand
---

# GMP A-rated third-party certified Free from soy, gluten, dairy, egg, nuts 500 mg high potency dose NOW Foods Supplements, Niacin (Vitamin B-3) 500 mg, Essential B-Group Vitamin*, Nutritional Health, 100 Capsules

**Brand:** now foods
**Price:** ฿1238
**Availability:** ✅ In Stock

## Summary

> 💥 Elevate your health game with NOW Niacin — the essential B-3 boost you can’t afford to miss!

## Quick Answers

- **What is this?** NOW Foods Supplements, Niacin (Vitamin B-3) 500 mg, Essential B-Group Vitamin*, Nutritional Health, 100 Capsules by now foods
- **How much does it cost?** ฿1238 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/642991421-now-foods-supplements-niacin-vitamin-b-3-500-mg-essential)

## Best For

- now foods enthusiasts

## Why This Product

- Trusted now foods brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Allergen-Free Formula:** Enjoy peace of mind with a soy, gluten, dairy, egg, and nut-free supplement crafted for sensitive lifestyles.
- • **Power-Packed 500 mg Dose:** Maximize your daily B-3 intake with a potent 500 mg capsule designed for optimal nutritional support.
- • **Trusted Legacy Since 1968:** Backed by decades of family-owned expertise and USA-based manufacturing for consistent quality.
- • **Certified Purity & Quality:** Trust in GMP A-rated, third-party tested supplements ensuring unmatched safety and potency every time.
- • **Daily Wellness Made Simple:** Just one capsule a day with meals supports your cardiovascular health and energy metabolism effortlessly.

## Overview

NOW Foods Niacin (Vitamin B-3) delivers a potent 500 mg dose of this essential B-group vitamin in a clean, allergen-free capsule. Manufactured in the USA by a trusted family-owned company since 1968, it meets rigorous GMP A-rated third-party certifications for purity and potency. Designed for daily use to support cardiovascular health and energy metabolism, this supplement is a must-have for health-conscious professionals seeking reliable nutritional support.

## Description

Vitamin B-3 Niacin (Vitamin B-3) is an essential B-group vitamin necessary for good health.* Natural color variation may occur in this product.

Review: Be aware of possible reactions. - I'm sure the product is great, but I'm apparently in the percentage of people who experience "niacin flush" from taking a B-3 supplement. Intestinal distress, heat flashes, and skin rash! Buy a small quantity if you've never tried it before.
Review: Review after taking and reading other reviews - I read reviews after I bought this while waiting for it to come in and I was worried about taking this because people where saying they had to go into the hospital over it. I'm taking this trying to lower my cholesterol levels and I was worried about the flushing but honestly it just feels like a sunburn (but not sensitive with touch like a normal sunburn) on face, ears, nose, arms, belly and in my case other sensitive areas. The flush only last 30 mins to an hour on me after that I'm fine. I do notice slight nausea after taking it during flush but not like I'm going to get sick from it. Sometimes I get a weird aftertaste that last awhile. The capsule is about the size of extra strength tylenol.

## Features

- NIACIN/VITAMIN B-3: Niacin (Vitamin B-3) is an essential B-group vitamin necessary for good health
- NUTRITIONAL HEALTH: Take 1 capsule daily as needed, with a meal. This high potency capsule should be taken under doctor's supervision
- CERTIFICATIONS/CLASSIFICATIONS: Soy Free, Made without Gluten, Dairy Free, Egg Free, Nut Free
- GMP Quality Assured: A-rated, third-party certification means that every aspect of the NOW manufacturing process has been examined. Our in-house laboratories are ISO/IEC accredited for laboratory testing including for stability, potency and product formulation.
- Packaged in the USA by a family owned and operated company since 1968

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B004LVW8TU |
| Best Sellers Rank | #71,220 in Health & Household ( See Top 100 in Health & Household ) #134 in Vitamin B3 (Niacin) Supplements #3,520 in Sales & Deals |
| Customer Reviews | 4.1 4.1 out of 5 stars (1,625) |
| Date First Available  | February 3, 2011 |
| Department  | Health and Beauty>Health and Wellness |
| Is Discontinued By Manufacturer  | No |
| Item model number  | 0481 |
| Manufacturer  | NOW Sports - Nutrition and Wellness |
| Product Dimensions  | 2.25 x 2.25 x 4.38 inches; 3.2 ounces |

## Product Details

- **Brand:** NOW Foods
- **Diet Type:** Kosher, Vegan, Vegetarian
- **Flavor:** Unflavored
- **Item Form:** Capsule
- **Primary Supplement Type:** Vitamin B3

## Images

![NOW Foods Supplements, Niacin (Vitamin B-3) 500 mg, Essential B-Group Vitamin*, Nutritional Health, 100 Capsules - Image 1](https://m.media-amazon.com/images/I/61U1Eq+WoYL.jpg)
![NOW Foods Supplements, Niacin (Vitamin B-3) 500 mg, Essential B-Group Vitamin*, Nutritional Health, 100 Capsules - Image 2](https://m.media-amazon.com/images/I/71AggOdc+BL.jpg)
![NOW Foods Supplements, Niacin (Vitamin B-3) 500 mg, Essential B-Group Vitamin*, Nutritional Health, 100 Capsules - Image 3](https://m.media-amazon.com/images/I/71Vs3FZTQNL.jpg)
![NOW Foods Supplements, Niacin (Vitamin B-3) 500 mg, Essential B-Group Vitamin*, Nutritional Health, 100 Capsules - Image 4](https://m.media-amazon.com/images/I/71iuXVd+QvL.jpg)
![NOW Foods Supplements, Niacin (Vitamin B-3) 500 mg, Essential B-Group Vitamin*, Nutritional Health, 100 Capsules - Image 5](https://m.media-amazon.com/images/I/71tSGZAe4QL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Be aware of possible reactions.
*by C***U on September 23, 2025*

I'm sure the product is great, but I'm apparently in the percentage of people who experience "niacin flush" from taking a B-3 supplement. Intestinal distress, heat flashes, and skin rash! Buy a small quantity if you've never tried it before.

### ⭐⭐⭐⭐⭐ Review after taking and reading other reviews
*by A***Y on April 7, 2025*

I read reviews after I bought this while waiting for it to come in and I was worried about taking this because people where saying they had to go into the hospital over it. I'm taking this trying to lower my cholesterol levels and I was worried about the flushing but honestly it just feels like a sunburn (but not sensitive with touch like a normal sunburn) on face, ears, nose, arms, belly and in my case other sensitive areas. The flush only last 30 mins to an hour on me after that I'm fine. I do notice slight nausea after taking it during flush but not like I'm going to get sick from it. Sometimes I get a weird aftertaste that last awhile. The capsule is about the size of extra strength tylenol.

### ⭐ Disappointing Experience with Intense Side Effects
*by R***I on February 21, 2025*

I bought NOW Foods Niacin 500 mg hoping to support my heart health, but my experience was far from positive. After taking just one 500 mg capsule on an empty stomach, I started feeling intense itching all over my body within 30 minutes—it was unbearable and lasted for over an hour. This is clearly the ‘niacin flush’ mentioned in reviews, but I wasn’t prepared for how severe it would be, especially spreading to my shoulders, back, and even my arms. On top of that, I also felt bloated and uncomfortable in my stomach, which made me hesitant to take it again. I understand niacin can cause flushing, but for a first-time user like me, the 500 mg dose felt way too high right out of the gate. The product description doesn’t emphasize enough how intense these side effects can be for beginners, and there’s no guidance on starting with a lower dose. I’ve since learned I should’ve taken it with food or started with a much smaller amount, but that information wasn’t clear on the bottle or packaging. While NOW Foods is a reputable brand, this product wasn’t a good fit for me due to the overwhelming side effects. I’m returning it and looking for a lower-dose or flush-free alternative. If you’re sensitive or new to niacin, I’d recommend skipping this or consulting a doctor first—otherwise, you might end up as uncomfortable as I did.” Pros: • Reputable brand, made in a GMP facility. • Vegetarian capsules, free of common allergens. Cons: • Extremely high 500 mg dose caused severe itching (flush) and bloating. • No clear instructions for beginners or sensitive users. • Side effects outweighed any potential benefits for me. UPDATE: Flush became worse during warm weather conditions and caused hypotension and become unconscious for few minutes. Very scary. Be careful if you are new to this.

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-03-02*