One Vitamin That May Affect Blood Vessels and Circulation: What to Know About Niacin

Although both can meet the body’s nutritional requirement for vitamin B3, they do not have identical effects when taken at higher doses.

Does Niacin Really Widen Blood Vessels?
Nicotinic acid can produce temporary dilation of small blood vessels near the skin. This effect is responsible for the well-known “niacin flush.”

Someone experiencing a niacin flush may notice warmth, redness, tingling, burning, or itching, particularly around the face, neck, chest, and arms.This reaction demonstrates that nicotinic acid can affect blood vessels, but it does not mean that taking niacin clears narrowed arteries or restores circulation to areas affected by significant vascular