According to the search results, the Airheads White Mystery flavor is a combination of several flavors that have been leftover or are part of the factory scrap. The flavor was created in response to a letter from a teenager who suggested making a "white bar with a mystery flavor". The flavor was introduced to the candy market in 1993 and has since become a permanent addition to the Airheads lineup. The exact proportions of each flavor used to create the mystery flavor profile remain a closely guarded secret that only Airheads knows. The taste of Airheads White Mystery can be hard to narrow down, as it combines natural and artificial flavors such as raspberry, blueberry, cherry, and citrus. Therefore, the flavor is unique and differs from other Airheads flavors in that it has a uniform white color, which helps to keep the mystery alive.