this is just stupid.
if this worries you,then:

dont drive (your vehicle releases too much carbon monoxide)
dont go to mamak stall and breathe in the smoke from smokers
dont eat too much fried food
dont drink colouring filled drinks
dont eat colouring filled food
dont drink carbonated drinks
dont take sugar
dont take salt

hell,just stay at home la since you're so damn scared of being killed by these insignificant issues