Yes, oiling your brows is a good way to condition the hairs and hair follicles which in turn can lead to hair regrowth. Fides recommends using castor oil, jojoba oil, and olive oil, “as these all have hair growth and strengthening qualities, but they are also great for the skin as they won't block hair follicles or cause breakouts. They will also treat the skin underneath the brow hairs that is often overlooked when it comes to skincare."