




From the brand

Source Naturals
Unlocking Wellness, Transforming Lives
High Demand Products

Source Naturals’ comprehensive Bio-Aligned Formulas® help bring the power of alignment to your body. When formulating, we evaluate the underlying causes of system imbalances, and then provide targeted nutrition to interdependent body systems. Our line of more than 600 products also includes well-researched, single-entity nutrients in their highest quality and most bioavailable forms.
New Arrivlas
How did we get our start?
Source Naturals® was founded in 1982 in Santa Cruz, California, by Ira Goldberg with the belief that the foundation for living your dream life is having vibrant health, and that taking individual responsibility for one’s health is the key.*
What makes our products unique?
The brand is renowned for its Bio-Aligned Formulas rooted in an integrative health philosophy.
What problem are we solving?
We have over 600 unique products spanning from immune, sleep, mood, and vision support to heart and brain health, and more.
Melatonin Supplements
Is Discontinued By Manufacturer : No
Product Dimensions : 4.6 x 4.6 x 8.6 inches; 2.88 ounces
Item model number : SN0504
Date First Available : February 16, 2004
Manufacturer : Threshold Enterprises
ASIN : B00020I7IU
Best Sellers Rank: #23,475 in Health & Household (See Top 100 in Health & Household) #32 in Vitamin B3 (Niacin) Supplements #1,757 in Sales & Deals
Customer Reviews: 4.6 4.6 out of 5 stars (721) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Niacinamide, also known as vitamin B-3, functions in over 50 metabolic reactions, most of which are enzymatic.
Suggested Use: 1 tablet daily.
Well Made Supplement: Contains no yeast, dairy, egg, gluten, corn, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.
Over 40 Years of Trust. Source Naturals was created in 1982 by CEO Ira Goldberg to support everyone’s potential to enjoy optimal health.
Manufactured in the USA. Manufactured in Scotts Valley, CA, under the Good Manufacturing Practices (cGMPs) established by the US Food and Drug Administration (FDA).
10 reviews for Source Naturals Niacinamide B-3, 100 mg Dietary Supplement – 250 Tablets
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$7.50

Freddy –
Really good product
Really good product
James K. –
Very effective supplement
This is a wonder pill for reducing pain and inflammation in joints. Of course , they can’t say that on the bottle or in their advertising. It was recommended by a well known online doctor so I thought I would try it. Low dose 3 x daily. After only a week my knee pain disappeared after a year of limping and misery. I can’t guarantee that it will work for your problem but it’s worth a try. I am no doctor but I can tell you it worked wonders for me. I’m walking normally for the first time in two years. No I wasn’t paid to say this!
N/A –
Great product
I used Slo-niacin 750mg daily for 4 months at dinner time, two years ago. It helped me loose weight. But it did create heavy flushing for me. While taking it I felt I could not drink alcohol, because it made the flushing worse. When I eat healthy, the flushing felt kind of nice. Also sometimes i would get dizzy when working out. So for me slo-niacin could only be temporary.I was missing the feeling and benefits of slo-niacin, so I tried smaller doses of both niacin and nicotinamide. I tried 100mg, 200mg, and 300mg of each. For me, with no particular health issues at the moment, I felt having 200mg nicotinamide at breakfast and 200mg nicotinamide at dinner felt great. I had less appetite, and craved healhtier foods more. Also it had a calming effect. I was able to drink a few beers a week with nicotinamide at this does and not feel any negative effects (for me that 5 beers total in 1 week, 1-2 per day, three days a week).So for me personally, nicotinamide is good for overall health. I like the skin benefits, mood calming, the feeling of liking healthier foods more, and appetite suppressant effects.In the near future I will likely reduce my 400mg per day to 100mg a day to see if it still has a similar effect, and then likely will move it up to 200mg per day. I try to just take the amount I need, and no more. Because taking too much of a supplement can deplete other nutrients.
Socratic Dog –
Interesting, unexpected, side effect
Can’t say whether it’s affecting my NADH levels, after 2 weeks. But I CAN say it’s affecting my testosterone levels. Plagued by night-long hard ons. Not every night, but several times a week. Helluva lot cheaper than Viagra. I looked it up, it’s a thing, it’s a testosterone precursor.
Jerri Moore –
Just as advertised
Gives me energy and my labs look good.
Carissa Holland –
very good supplement
very good supplement
MARGARITANUNEZ SANTOS –
NIACINAMIDE B 3
Vitamina b3 suplmentos para articulasionesMe has ayudDo muchAyuda los calambre adormesimientoLo recomiendi
Asokha –
Good price but not sure of the value.
I really can’t tell whether this supplement is effective. I used to take another brand of same dosage which was flush free but I would still get flush if my stomach was not full. I decided to try this one because the price is good. I sometimes take two of these at once and I have never gotten a flush as yet. The flush indicates saturation of b3 so it makes me wonder if this b3 has the dose it states. I have no ill effects of this supplement and it may have some unrecognizable benefits so I gave 3 stars. I don’t think I will buy this brand again though.
emiko –
この量が 一番いいです
Vijaya Pandji –
I normally like Source Naturals but every time I take it l get stomach pain and diarrhoea