Translations:Vitamin B3/14/en

ULs are established by identifying amounts of vitamins and minerals that cause adverse effects, and then selecting as an upper limit amounts that are the "maximum daily intake unlikely to cause adverse health effects". Regulatory agencies from different countries do not always agree. For the US, 30 or 35 mg for teenagers and adults, less for children. The EFSA UL for adults is set at 10 mg/day – about one-third of the US value. For all of the government ULs, the term applies to niacin as a supplement consumed as one dose, and is intended as a limit to avoid the skin flush reaction. This explains why for EFSA, the recommended daily intake can be higher than the UL.