菸鹼酸 Niacin

the totality of the scientific evidence no longer supports the conclusion that a drug-induced reduction in triglyceride levels and/or increase in HDL-cholesterol levels in statin-treated patients results in a reduction in the risk of cardiovascular events

Taking high doses of nicotinic acid supplements can cause skin flushes. Taking high doses for a long time could lead to liver damage. ... Taking 17mg or less of nicotinic acid supplements a day, or 500mg or less of nicotinamide supplements a day, is unlikely to cause any harm.

菸鹼酸（包括菸鹼醯胺）屬第（八）類營養添加劑；用於錠狀、膠囊狀食品，每日食用限量以菸鹼素當量（N.E.）計不得超過 100 毫克。

Pellagra is treated with at least 300 mg of nicotinamide in oral divided doses daily for 3-4 weeks. Nicotinamide is recommended in preference to nicotinic acid (niacin) because it does not cause the flushing reaction.

綜合維生素B群，包含B1、B2、B3、B5、B12、B9，長效持續8小時

菸鹼素每日攝取量上限為100毫克菸鹼素當量；含維生素或礦物質之口服藥品基準表中，菸鹼素每日量逾35毫克NE且宣稱療效者列為指示藥品