Though niacin has considerable health benefits, taking high amounts ... However, very high levels of niacin can damage the liver and affect vision, among other symptoms. It’s important to ...
according to the Mount Sinai Health System. High niacin levels can cause headaches, diarrhea, gout, dizziness, blurred vision, diabetes, rapid heart rate, upset stomach, itching, liver damage and ...
Niacin, a B vitamin ... revealed the potential for more serious health issues. Those taking it had more diabetes, bleeding, infections, and liver problems. There are experts who dispute the ...