In your 20s, your beauty routine matters...but there's room for error (a consoling fact for those of us who still go to bed with our makeup on sometimes). But, once you hit 30, it's time to make some important changes to your day-to-day regimen, especially when it comes to preventative care. To find out what modifications need to happen, we chatted with chemist and beauty industry expert David Pollock, who shared the following five tips.

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