Henna brows is a natural alternative used to stain the skin beneath the brow hairs in order to cast a shadow or create an illusion of depth and fullness, making up for sparseness of the brow. The henna tints are made of natural plant-based ingredients from a plant called hina (or henna tree), which has been used for dyeing hair, clothes, fabrics and as makeup for ages. This method is vegan-friendly and free of peroxide activators, making it a good option for those who have sensitive skin.