In addition, niacin supports the cells that line your blood vessels—called endothelial cells. These cells help control blood pressure and allow your vessels to widen or narrow when needed.
If you have poor circulation, your blood vessels may become stiff or narrowed over time. Niacin works by helping to open them up again, reducing your risk of clots, swelling, and cold or numb feet. Some people even feel a temporary “niacin flush”—a gentle warmth or tingling in the skin—as blood flow increases, especially in the limbs.
Other Vitamins That Support Healthy Circulation
Although Vitamin B3 is especially effective, there are other vitamins that can also support your circulation:
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Vitamin E is a powerful antioxidant that helps prevent clots, supports the production of red blood cells, and may ease cramps from poor blood flow.
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Vitamin C is vital for making collagen, which strengthens the walls of your blood vessels. It also helps reduce inflammation so arteries stay flexible.
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Vitamin D helps prevent blood vessels from stiffening and supports healthy blood pressure—both are important for circulation in your legs and feet.
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Vitamin B12 is needed to create healthy red blood cells. Without enough B12, oxygen delivery to tissues drops, leading to poor circulation and fatigue.
Best Food Sources and Supplement Tips
You’ll find Vitamin B3 in everyday foods such as chicken, turkey, tuna, salmon, brown rice, and legumes. If you’re struggling with circulation and diet alone isn’t enough, your doctor may suggest a supplement. Always use supplements responsibly—high doses of niacin can cause side effects like flushing, dizziness, or liver issues if misused.
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