烟酸的功效和作用是什么？

Nicotinic acid. It is a precursor of the coenzymes NAD and NADP. Widely distributed in nature; appreciable amounts are found in liver , fish, yeast and cereal grains. Dietary deficiency is associated with pellagra. The term “niacin” has also been applied to nicotinamide or to other derivatives exhibiting the biological activity of nicotinic acid. Vitamin (enzyme cofactor).烟酸在具有以下功能的保健食品中使用过该原料（注：不代表该原料本身具有以下保健功能）,具有如下功能:
缓解体力疲劳,减肥,增强免疫力,辅助降血糖,通便,改善生长发育,缓解视疲劳,辅助降血脂,对化学性肝损伤有辅助保护功能,其中在宝健牌多种维生素矿物质片,多乐益宝R维生素B族片,华北牌多种维生素片,中就有使用过该原料.
说明：以上对于原料功效的说明仅来源于其在对应保健食品中的运用，不代表该原料本身具有以下保健功能。