What is the half life of niacin?

The half-life of niacin (vitamin B3) in the human body generally ranges from about 20 to 45 minutes, depending on various factors such as dosage and individual metabolism. Niacin is rapidly absorbed and metabolized, with its effects typically peaking within a few hours after ingestion. Due to its short half-life, frequent dosing may be necessary to maintain therapeutic levels in the bloodstream.