If you’re referring to the viral claim that one particular vitamin can “reverse poor circulation,” warm cold legs, and restore blood flow to levels seen decades younger, there isn’t good evidence for that claim.
Cold feet or poor circulation can have many causes, including peripheral artery disease (PAD), diabetes, nerve problems, thyroid disorders, anemia, certain medications, or simply being in a cold environment. PAD is particularly important because it can increase the risk of heart attack, stroke, and limb complications.
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professional.heart.org
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What about vitamins?
A vitamin can correct circulation-related symptoms when someone actually has a deficiency. But taking a vitamin when you’re not deficient hasn’t been shown to restore aging blood vessels to a decades-younger state.
In particular, current PAD guidance does not recommend B-complex vitamins simply to improve cardiovascular outcomes by lowering homocysteine.
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www.heart.org
For diagnosed PAD, evidence-based management includes things such as regular/structured exercise, stopping smoking, controlling blood pressure, cholesterol and diabetes, and appropriate medications. In some cases, procedures are needed to restore blood flow.
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professional.heart.org
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Don’t ignore persistently cold feet, especially if one foot is colder than the other, you have leg pain when walking, numbness, skin discoloration, or sores that don’t heal. A clinician can check circulation, often including an ankle-brachial index (ABI).
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professional.heart.org
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If you give me the name of the vitamin being promoted, I can tell you whether there’s actual evidence behind that specific claim.
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