If it was making your product addictive maybe, but I cant see radiation making it addictive, so wouldnt you just be killing off your market base?
The World of Fallout, Nuclear was Good. Nuclear Made Your Life Better. Nuclear is the Answer to Everything. So what's a few Rads between friends.......
Of course they have studies that show that Radiation is only dangerous above a certain level. That means that anything below that level is OK. And, they just have to slap a label on the bottle mentioning something about excess consumption being detrimental to your health and they can sleep soundly at night.