Wellington, awesome job, thanks for the links. I usually buy supplements from bodybuilding.com its a huge operation with good prices, but unfortunately they do not carry niacinamide (nicotinamide -nicotinic acid amide) at all. iHerb has 10 products with it!!!
There is this stupid rule (personal opinion) for not posting links for internet pharmacies in the forum, probably you are going to get an e-mail saying that you should not do this again. I understand that people here do not want any such "advertisement" in the forum, but how we can help each other with great on-line shops we found and critic the not so good (there are forums doing just that). Moreover we are able enough to see if the site suggested is good enough or no.
Now for Niacin and Niacinamide,
Niacin is converted to niacinamide. Although the two are identical in their vitamin activity, niacinamide does not have the same pharmacological effects of niacin, which occur as side-effects of niacin's conversion. Thus niacinamide does not reduce cholesterol or cause flushing, although niacinamide may be toxic to the liver at doses exceeding 3 g/day for adults. In overall, it rarely causes side effects, and is considered generally safe as a food additive. Animal studies show that niacinamide has anti-anxiety (anxiolytic) properties, and it may work in a way similar to benzodiazepines.
In the link I gave in the first post:
http://www.revolutionhealth.com/drugs-t ... y-disorder
All of the reviewers used Niacinamide