Improve Your Complexion in 90 Days: Tip #3 - Employ a serum

A serum is a multivitamin for your skin, reaching down into all three layers of the skin, unlike moisturizers which sit atop the skin and shield it from toxins. Serums work more correctively and aggressively to produce a healthy, youthful glow. All skin types benefit from hydrating, nourishing serums. Apply serums to freshly cleansed skin, before moisturizer.