Niacin provides one form of vitamin B3. Taking it causes a harmless but noticeable flush: warmth, redness, and tingling in the skin. People sometimes choose it deliberately for this vasodilating effect. This vitamin helps maintain normal cholesterol levels and supports energy metabolism and nutrient processing.
Take a single daily dose with food to reduce stomach upset. Many people choose niacin for blood lipid support (when levels are already normal) or as a general B vitamin for energy and circulation. If the flush is undesirable, opt for non-flush or sustained-release versions. These cut the flush but can increase the risk of liver stress.
The flush sensation may startle you but causes no harm. Do not take large doses without guidance from a doctor, especially if you use statins or blood thinners. These combinations can cause interactions.