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iHerb Customer Reviews



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Vitamin B3

Posted by Reviewer2183128 on Apr 04, 2011

Just be prepared for the Niacin Flush. The first couple of weeks of taking this I got a good healthy flush out of this every time. Problem is I did not know that B3 did this to a person. Turns out it is a very good thing. You should at least research "Niacin Flush" before you take it so you are not surprised or think you are having an allergic reaction. I am sure that a person might also look to see if it has any bad side effects, but I found nothing only good remarks about how wonderful it is for your health. I recommend this product.

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Posted by Reviewer2203085 on Apr 11, 2011

Besides the strong flushing, it works good.

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Good Niacin.

Posted by Reviewer1578830 on Aug 11, 2012

Definitely have a flush with these which is supposed to be a sign of it working. However the flush seems to be rather delayed in onset. Sometimes even hours later, sometimes no flush at all which makes me wonder if it is a result of the combination of other supplements taken at the same time or just some are dud.

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Life Extension, Vitamin B3 Niacin, 500 mg, 100 Capsules

Posted by Reviewer2485668 on Oct 24, 2012

Life Extension, Vitamin B3 Niacin, 500 mg, 100 Capsules

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Posted by debraananda on Jul 26, 2011

The first 3 times I took this product I produced a really bad rash, I was very red and hot all over, the fourth was a little better, but I have not taken it since

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Take With Caution

Posted by Krisinsight on Jan 23, 2015

I received my iherb order yesterday and decided to try the Niacin from Life Extension I had ordered. I wisely dumped half of the capsule out before popping it in my mouth because I have experienced Niacin flushes before. Nothing happened for about 30 minutes. Since I was feeling okay I then had a cup of hot herbal tea. The flush came on with a bang starting with my face, my neck, my arms and then legs. Then my heart started beating rapidly and my tongue felt slightly swollen and my mouth dried out. I had the most severe chills (due to heat in my body from the flush) I have ever experienced but I knew I needed to drink water to flush the flush, so with shaking hands I drank water and lots of it. I think about two hours later it was over. I started researching the dose of 500 mg. On every site I went to 250 mg was considered a high dose and possibly an overdose. Now I wonder why almost everyone in the reviews think that 500 mg is a good dose to take and I see that LE sells a 1000 mg dose capsule as well. My conclusion: Taking a high dose Niacin is not for me (perhaps the fact that I take thyroid meds accentuate the flush and chills). If I take it again I will not follow up with hot tea and I will only take a very small portion of the capsule.

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Holy flush

Posted by Reviewer1972599 on Oct 31, 2012

I have never had a flush before but this was HORRIBLE. I stuck it out for about a week and then stopped. Shouldve stuck it out for longer as apparently it takes a couple of weeks to stop. I did feel quite good otherwise though.

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Posted by Reviewer2726790 on Sep 14, 2009


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It is hard

Posted by 4979708457747705135 on May 22, 2016

The flash was too hard. I tried once.

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