使用去角质产品肯定是正确的，比如含砂糖和花生壳的磨砂膏确实可以去除老化的表皮层，让皮肤重新变得柔嫩而焕发光彩。

There’s no question that using exfoliants, such as scrubs that contain sugar or ground nut shells to slough off dead surface layers, can indeed reveal softer, healthier-looking skin.

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角蛋白是蛋白质的一种，广泛存在于人和动物的表皮、毛发以及动物的蹄、壳、爪、角中，是一类性能优良的天然生物复合材料。

Keratin, a kind of protein, exists widely in human and animal organs, including epidermis, hairs, wool, feather, hoof and horn. It is a natural compound material with good properties.

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