One Vitamin That “Opens Blood Vessels” — What’s the Truth?
The vitamin most often associated with blood-vessel widening is vitamin B3 (niacin). Nicotinic acid, a form of niacin, can cause vasodilation and flushing, which makes the skin feel warm or look red.
But that doesn’t mean taking niacin is a good way to “improve circulation.” Niacin supplements shouldn’t be used as a circulation treatment without medical advice. High doses can cause flushing, dizziness, increased blood sugar, and potentially serious liver or muscle problems.
🥗 Getting B3 from food
Most people can obtain adequate niacin from foods such as chicken, fish, meat, peanuts, and fortified grains. Getting niacin naturally from food doesn’t produce the intense flushing associated with high-dose nicotinic acid supplements.
⚠️ Important distinction
If you’re experiencing cold feet, numbness, leg pain when walking, swelling, or persistent circulation problems, don’t try to treat the symptoms with a vitamin. Poor circulation can have several causes—including peripheral artery disease—and deserves proper evaluation.
