"Just when I thought I had all the serums I needed, Dr. Barbara Sturm launched this Brightening Serum ($310) that might be her best yet. It instantly gives my skin a glow that wakes me up and also includes key botanical ingredients that actually brighten dark spots and protect my skin. If you can only buy one product of hers, this one is a perfect combo of calming, protecting, glowing — and it contains key trendy ingredients like hyaluronic acid." — Lisa Sugar, editor-in-chief