But the skin benefits of these natural compounds are primarily due to their antioxidant activity.

但这些天然化合物对皮肤的好处主要是由于它们的抗氧化活性。

In case you're not familiar with glycerol, it's a natural alcohol compound.

Furby：如果你不熟悉甘油，它是一种天然的酒精化合物。