Nailing the perfect brow arch can seem like an art form, and if you’re dealing with barely-there hair, it can feel like all hope is lost. Like overall women's hair loss, eyebrow thinning is super common. Some of the most common culprits include over-plucking, age, and certain diseases, says board-certified dermatologist Mona Gohara, MD, a clinical professor of dermatology at Yale University School of Medicine and a Women's Health medical advisory board member. "Brow thinning can be your body telling you that there's something going on like thyroid abnormalities or autoimmunity," she says. Luckily, there are plenty of eyebrow growth serums that can boost your fullness and help you reach #browgoals. The catch? You’ll need to be patient and shop smart—that means scouting serums that contain known growth stimulators like prostaglandins and peptides as well as ingredients that can help with inflammation, which can interfere with hair follicles, says Joshua Zeichner, MD, FAAD, director of co...