You Can Now Tint Your Eyebrows With Henna. When used in your hair, henna is considered permanent, but it fades away naturally within 2 to 4 weeks on your brows, similar to the time frame of a vegetable-based tint.

Henna will not only dye the hairs, but will leave a stain for approx up to 2 weeks on the skin behind the brow, giving the brow a fuller and filled in look. In terms of longevity, Tint lasts up to 4 weeks on the hair, Henna can last 6-7 weeks on the hair.