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Sunscreen must-knows | Michelle Wong, PhD

The Proof with Simon Hill

CHAPTER

Is Retinol a Cosmetic?

In skincare, a lot of it is to do with what you are putting on your skin. How can stuff you put on affect the rest of your body? But the thing is, it is meant to be there to act as a barrier, but it also does let some stuff in. So for example, if there's high humidity or lower humidity, then the skin will actually release substances to keep the hydration at a relatively stable level. This is all like how humans evolved. We have these top dead skin cells and these come off about one layer a day. And this slowing off is actually helping keep your skin relatively hygienic.

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