Posted by Anne (Seattle, Wa) on 05/23/2012
I have used 500mg of Niacin twice a day for years to fight insomnia and RLS. When I ran out of Niacin for a week my insomnia and RLS returned with a vengence. I dug through my cupboards, found some and was asleep 30 minutes later.
Niacin deficiency is pinpointed as the culprit in many neurological issues by Dr Hoffer including ADHD There is rumors of a toxicity issue with long term high doses but many people have taken up to 3000mg daily long term.