One vitamin that opens blood vessels and improves circulation
If you mean the popular claim “one vitamin that opens blood vessels and improves circulation,” the closest match is niacin (vitamin B3)—but the claim needs an important qualification. Vitamin B3 (niacin) Niacin, specifically nicotinic acid, can cause temporary vasodilation and skin flushing. This happens because blood vessels near the skin widen, producing warmth, redness, tingling, …









