#LetsGetActive: If hydration was an extra-curricular activity, squalane would top the class. This skincare multi-tasker doesn’t just reduce the appearance of fine lines and fade dark spots, but it also gives your skin a major boost of hydration without feeling heavy. Plus, it helps repair your skin barrier by preventing transepidermal water loss, which can leave your skin flaky and rough due to dehydration, too. Pro tip: If your skin is feeling particularly parched, pair this ingredient with hyaluronic acid to create the ultimate hydration duo.