If you notice other symptoms after high doses of niacin, you should consult a healthcare professional. Even if you flush when you first start taking it, it may not always happen when you supplement with niacin. Reddening of the face, neck, or upper body (like a sunburn).Niacin’s benefits for heart health and vascular health come from its ability to dilate blood vessels effectively.Įven though niacin flush is uncomfortable, it is a sign of this nutrient’s benefits! Symptoms of niacin flushing include: Researchers have worked to create “no-flush” niacin or extended-release versions, but that comes at a price. But a niacin flush is neither of these things. If you have histamine intolerance or other food sensitivities, it’s easy to confuse the reddening reaction with a histamine response or immune activation. This is the main reason that people stop taking niacin. If you don’t know what to expect, it can feel alarming. Sometimes there is a feeling of warmth, tingling, or itchiness with the flushing. A niacin flush can happen quickly – within five minutes of taking niacin – or may not appear for 15-45 minutes. It usually looks like the type of redness you get from a sunburn. It generally occurs on the face or upper body. In many cases, niacin flushing just looks like a reddened appearance of the skin. †(1, 2) What Does the Niacin Flush Feel Like? In fact, vasodilation leads to better circulation, capillary flushing, and increased blood flow to the surface of the skin. It does not damage capillaries and is not dangerous. This triggers a reddening or flushing appearance or sensation. This means that it helps dilate, or expand, the blood vessels under the surface of the skin. In fact, niacin flushing has some benefits! However, many do not understand what causes niacin flush or that it is harmless. As many as one-fifth of people who supplement with niacin end up stopping because of the flushing side effect. Flushing is also a common side effect of taking niacin in the form of nicotinic acid. For example, if you take niacin as a standalone supplement or in a B-complex form along with other niacin supplements, you may experience a niacin flush. However, if you take additional niacin, you may be more likely to experience a niacin flush. (1)Ī niacin flush is not usually caused by the small amount of niacin found in most multivitamins. Sometimes it may also feel like itching or burning sensations. Niacin flushing is a side effect of taking higher doses of vitamin B3 supplements. It is found in supplements like multivitamins, prenatal vitamins, B complexes, and more. Niacin ( vitamin B3 ) is a water-soluble B vitamin. In this article, you’ll learn more about the niacin flush, its benefits, what to do if it happens, and how to prevent it. It can also happen if you don’t take niacin-containing supplements with food. This harmless reaction can occur if you take more niacin than your body is used to taking. Unlike other nutrients, niacin, also known as vitamin B3, causes something known as the niacin flush. Have you ever taken a supplement and flushed red a little while later? It’s natural to assume you’ve had an allergic reaction.
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