Niacin 500 MG | GNC

GNC Niacin 500 MG


Item # 254115
Note: This product cannot be sold in Canada

Product Information



Supports a healthy blood lipid profile*
Supports blood vessel health*


Nutrition Facts
Serving Size  1 Tablet(s)
Servings Per Container  100

Amount Per Serving     % DV

Niacin 500mg   2500%

** Daily Value (DV) not established.
Other Ingredients
Cellulose, Whole Brown Rice Powder (Oryza sativa)
Label (click image to enlarge)

How To Use

As a dietary supplement, take 1 tablet daily.
Niacin may cause a temporary flushing reaction. Consult your physician prior to using this product if you are pregnant, nursing, taking medication, or have a medical condition. Discontinue use two weeks prior to surgery.


4.8 / 5.0
17 Reviews
5 Stars
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1 Star
Niacin for cardiac maintenance
I have been taking GNC NIacin tablets (1000mg/daily) for several years. It has helped to raise my healthy HDL cholesterol levels which were low of normal before the Niacin regime. I had tried the "non-flushing" Niacin but it did not seem to affect my HDL level. The occasional flushing is not a problem for me as i have adjusted to it. GNC is one of the few places that I could find Niacin tablets. Thank you. John Gibert
December 5, 2018
1 month ago
Niacin 500 mg
this is a potent brand of niacin. gives you that flush feeling. highly recommend if you like the niacin flush.
December 3, 2018
1 month ago
Started taking this several years ago after my cholesterol went above normal. I have great cholesterol levels now.
November 20, 2018
1 year ago
Great to have it unaltered!
October 15, 2018
2 months ago
Gets the job done.
October 5, 2018
3 months ago
I have experienced a higher good cholesterol level in the several years I've taken this product. I like regular not the no flush because you can actually feel it in your system unlike other supplements.
September 10, 2018
3 months ago
Perfect 10
August 9, 2018
4 months ago
My husband has to take Niacin and GNC is the only place in our area to get it. Don’t know what we would do without GNC. Love this product keeps my husband heart healthy!
July 19, 2018
5 months ago
Great but go back to smaller size
I have been using this product for more than 20 years; was advised by my primary care physician who was a cardiologist also plagued with high cholesterol. My numbers went from a high of 315 total cholesterol to below 145 and with few exceptions, have stayed below that during the whole time, but I also take a statin.

My only complaint is that the GNC product has changed the size of the 500 mg tablet from a smaller round pill to one that is elongated and about twice the size with the same potency. The size increase makes it difficult to carry sufficient pills in a daily pill case. Please return to the smaller size!
May 1, 2018
Awesome, gets job done
April 27, 2018
8 months ago
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 15 questions Browse 15 questions and 15 answers
Will this product rid my body of THC and how long will it take?
A shopper on Mar 23, 2016
how does my body react when I take this pill?
A shopper on Mar 23, 2016
FLUSH OR NO FLUSH? GNC Niacin 500 mg
Robert K on Apr 5, 2016
BEST ANSWER: Immediate release, can cause skin flushing. Some use aspirin to lessen flushing. I've gotten used to the flushing, mostly upper body, typically dissipates within an hour.
Does this niacin pill clean your entire system out, and how long does it take?
A shopper on Jul 25, 2013
BEST ANSWER: This item supports blood vessel health. Product description does not include cleaning your system out.
Does it really flush everything out your system?
Remy H on May 28, 2018
is it a non flush version or flush version?
A shopper on May 6, 2014
BEST ANSWER: This is the flush version. The no-flush is labeled as such, GNC No Flush Niacin 500 MG.
What form of niacin is this? The label simple states that it is niacin.

The nicotinic acid form of niacin lowers cholesterol, but other forms of niacin do not. These other forms that do not lower cholesterol include nicotinamide and inositol nicotinate.
A shopper on Dec 17, 2013
BEST ANSWER: It is Nicotinic Acid.
is niacin also a toxic cleanser
A shopper on Jan 15, 2014
BEST ANSWER: Yes indirectly as it supports healthy blood vessel development. Healthy blood vessels carry toxins out of the blood.
Is this product "slow release"?
A shopper on Aug 1, 2013
BEST ANSWER: No, in fact the product may react quickly giving your system a flushing like feeling.
Do you get a flush each time you take 500MG three times a day if you take three capsules a day?
Lynford T on Mar 19, 2018
BEST ANSWER: if you took them all at once (1500mg)- absolutely you will flush, By parceling them out to one 500 mg capsule 3x a day you may still experience a less intense flush, or a fairly intense flush for a shorter duration than if you took all three at once. Of course, your personal biology will determine the intensity of your response. Not taking it for several days will usually mean that the next time you take niacin, your response will likely be stronger or more pronounced- or more noticeable -than if you take it every day. This may also include facial . upper body redness and a redness and puffiness in the hands ( especially tops of wrists when the palm is bent back.) this is normal and just part o the "flush."

I hope this was helpful.
Will your body eventually build up a tolerance to the flushing or will it always be the same?
Joseph R on Apr 19, 2018
BEST ANSWER: I gradually built up a tolerance.
How long until your system is cleansed?
A shopper on Feb 21, 2018
does it help your brain?
pete d on Sep 5, 2018
BEST ANSWER: I don’t know. It does seem to help triglycerides
The label just says "Niacin 500 mg". What form is the Niacin? Is it nicotinic acid?
A shopper on Oct 4, 2013
BEST ANSWER: Yes, it is nicotinic acid.
I am looking at a produce called Super Beets. The question is does GNC have a product that does the same?
rell3d - on Sep 9, 2016