Commonest ones include chocolate, cheese, purple wine and completely different foods which can be high in nitrates. You don't want surgery -- you need solely eat the right foods to rejuvenate your skin and take years off your look, says dermatologist Nicholas Perricone, M.D. They normally take about two weeks to heal, however some bruises can final months. As this occurs, the color of the bruise can fade from darkish to mild and take on all kinds of interesting hues along the way in which. The light could be very directional. This color change occurs as the body reuses the iron in the hemoglobin to type new purple blood cells - the unused, decomposed hemoglobin transforms right into a inexperienced pigment referred to as biliverdin, Dr Farzad Roshanzamir which then converts into a yellow or gentle brown-tinged compound known as bilirubin.