One vitamin that opens blood vessels and improves circulation
If you mean one vitamin that can directly cause blood-vessel widening, the classic example is niacin (vitamin B3). Niacin can cause vasodilation, producing the familiar flushing/warm sensation. However, this does not mean niacin is a good treatment for poor circulation. High-dose niacin can cause liver injury, increased blood sugar, low blood pressure, and other side …









