menaquinone

例句：

1. 1.Vitamin E is essential for maintaining healthy skin and hair.
   维生素E对于保持健康的皮肤和头发至关重要。
2. 2. The supplement contains a form of vitamin E that supports the immune system.
   这种补充剂含有一种支持免疫系统的形式的维生素E。
3. 3. Menaquinone is often used in skincare products as an antioxidant.
   维生素E常用于护肤产品中，作为抗氧化剂。