Lead has been found as a contaminant in some lipsticks, raising health concerns. Brominated vegetable oils (BVOs) have been used as an emulsifier in some soft drinks, although their use is restricted or banned in certain regions due to potential health risks. Monosodium glutamate (MSG) is commonly used as a flavor enhancer in Chinese fast food and other cuisines, and while controversial for some individuals, it is generally considered safe by regulatory bodies when used within limits.