niconacid

例句：

1. 1. This food contains a lot of niacin, which is essential for good health.
   这种食物含有大量的尼克酸，对健康至关重要。
2. 2.Niacin is important for maintaining good eyesight and preventing heart disease.
   尼克酸对于保持良好的视力和预防心脏病非常重要。
3. 3.The body needs niacin to produce energy and maintain muscle function.
   身体需要尼克酸来产生能量并维持肌肉功能。