Is taking 1000 mg of niacin dangerous?

Too much Niacin in VERY height does for a long period of time is said to cause some liver damage that may or may not reverse itself.

It can give you skin flushing, and has been known to cause itching, rashes, and nausea in some people. It also can give you a warm sensation that is sometimes not pleasant to some people.

Some side effects do not happen to all people. In addition, some side effects are disputed as well.