So, once again, what is “real niacin”?
Real niacin is nicotinic acid or flush niacin. Fake niacin is niacinamide or nicotinamide. The later two are found in statins and have additives to mitigate the flush. Embrace the flush.
It's pure nicotinic acid, also known as "flush niacin". Avoid anything that has niacinamide, no-flush, sustained-release in the name.
PureBulk has a remarkable product -- three years in the making -- called GPR109A. It combines real niacin, real folic acid (not some "folate" substitute), and N-acetyl L-glutamine (a natural amino acid in a highly bioavailable form) in just the right proportions. This mixture maximizes the benefit of the niacin and reduces the flush somewhat.
See GPR109A.COM for more information. On that page you'll find a direct link for purchasing the product at PureBulk.