Get effective stain removal power that's tough on grime with our bio super concentrated liquid. Bursting with fresh fragrance, it'll keep clothes looking and smelling good all day long. Why buy bio? Bio is short for biological, which means your liquid contains enzymes, which helps speed up the break-down of proteins, fats and starch. This makes bio especially good at removing stains like chocolate or grease from food. It's particularly good at low temperatures too.