necic acid

例句：

1. 1. Hetook a supplement containing nicotinicacid to improve his skin condition.
   他服用了含有烟酸的补充剂来改善他的皮肤状况。
2. 2. The medication contains nicotinic acid to treat hypertension.
   这种药物含有烟酸，用于治疗高血压。
3. 3. Niacin is an essentialnutrient for the human body andcan be found in foods such as meat, fish, and eggs.
   烟酸是人类身体必需的营养素，可以在肉类、鱼类和鸡蛋等食物中找到。