One vitamin that opens blood vessels and improves circulation
If you’re looking for one vitamin associated with blood-vessel widening, the answer is niacin (vitamin B3). Niacin can cause vasodilation, producing the familiar “niacin flush”—warmth, redness, and sometimes itching. However, that doesn’t mean taking niacin is a good way to treat poor circulation. High-dose niacin can cause liver damage, low blood pressure, elevated blood sugar, …









