Harvard Health Letter

Elevating your HDL game

Taking niacin is an effective way to boost HDL cholesterol, but there are side effects to consider. Niacin can increase blood sugar levels and lead to liver damage. But the most common side effect is flushing, a sensation of prickly heat in the skin that usually affects the head, face, and neck. People also turn red, and a few get itchy and suffer nausea. 
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