By Lori Segal

Try as I might, my perfectionist personality can't stop tweezing every last sparse hair, sometimes resulting in wonky, asymmetrical arches and disappointing sparseness.

Waiting for the hairs to grow back can seem to take an eternity, and I vainly try to remedy the issue in the interim with a combination of Sania's Brow Bar Angled Mechanical Brow Pencil, Clarins Kit Sourcils Pro Perfect Eyes & Brows Palette, and prayers 🙏 to the eyebrow gods for speedy improvement.

Luckily, I’ve been able to cut the prayers out of the process, thanks to the RevitaBrow Advanced Eyebrow Conditioner. The serum, created by Best of Beauty–winning brand RevitaLash Cosmetics, comes in a tiny tube with a wand barely bigger than my pencil, and acts like a deep-conditioning hair mask to my overworked brow hairs.

It's packed with peptides and biotin, and after only about four weeks of nightly use, my brows seemed fuller and felt less brittle. Brow groomer and makeup artist Maribeth Madron recommends applying it strategically. “If you sweep it all over your eyebrows, you'll make your healthy spots look longer and darker, which can make sparse areas more obvious,” Madron explains. Instead, brush the conditioner on clean, dry skin and only on the areas you want to appear fuller.

Now that my brows are in better shape, I'm no longer living on a prayer for fuller-looking brows.