vitamin U

例句：

1. 1.Vitamin U is essential for maintaining good health.
   维生素U对于保持健康至关重要。
2. 2. The supplement contains vitamin U, which helps to boost the immune system.
   这种补充剂含有维生素U，有助于增强免疫系统。
3. 3. Many people take vitamin U supplements to improve their skin health.
   许多人通过服用维生素U补充剂来改善皮肤健康。