Try a facial oil! They feel luxurious, bring back your skin's brilliance, and they're a great way to protect against TEWL: transepidermal water loss. Yes! That's a thing. Cold, dry weather conditions will take moisture from your skin. Oils create an occlusive barrier between your skin and the environment keeping in both your natural moisture and the moisture from your products. what step in my routine should I use an oil? Definitely your last step after moisturizer. Even if the oil says to use it at the serum step. Serums in theory should be able to pass tran[...]