That may not be a good idea, and now a new paper suggests that people who consume too much vitamin B3 might be at higher risk of developing eczema. ... When an adverse effect like eczema is linked to ...

Generally, niacin is not very toxic as this vitamin is excreted through the urine. Taking more than 1 000 mg per day will merely cause the face to look flushed for a while. But a niacin intake of 3 g ...

An older high quality study also noted that single doses of 100 mg and 500 mg of niacin slightly reduced right ventricular systolic pressure. However, more research is needed to confirm these effects.

It also discusses the signs of liver damage due to too much niacin and the next ... some people undergoing dialysis have been seen to experience adverse effects when taking doses of 500–1,500 mg ...

You really can have too much of a good thing. Case in point: The niacin, aka vitamin B3, in energy drinks could lead to acute hepatitis. On Tuesday, a case study published in the British Journal ...