There's Flame Retardant in Mountain DewCasey Chan12/14/11 11:40am285EditInvite manuallyPromoteDismissUndismissHideGo to permalinkMountain Dew. The oh so sweet is it yellow? is it green? nectar of the geek gods and fuel for gamers has flame retardant in it. Yup. Mountain Dew, along with 10 percent of sodas in the US, contains brominated vegetable oil (BVO), a flame retardant chemical banned in Europe and Japan.