Bio-oil natural oil, a product that results in an all-natural version of the original scar and stretch mark formula. Bio-oil is designed for specialist skin care for scars and stretch marks made with 100% natural ingredients. It helps improve the appearance of old and new scars. Scars are an integral part of the healing process and are the result of an overproduction of collagen at the wound site. In addition, it reduces the possibility of stretch marks during pregnancy, teenage stretch marks and those resulting from rapid weight gain.