The Niacin Flush: What It Is and Why It Happens

Niacin is well known for a temporary flushing reaction — worth a direct, standalone explanation before your first dose.

What's typically normal

A warm, reddening sensation on the skin — the "niacin flush" — is a well-documented, generally harmless response to Niacin, caused by temporary blood-vessel dilation, and often lessens with continued regular use.

When to actually contact support or a doctor

If the flush is severe, accompanied by significant discomfort, or doesn't follow the typical mild, temporary pattern, mention it to your doctor rather than assuming it's the expected response.