Turnip juice plus red dye?
One problem seems to be the media leaping on things like this and blowing it out of proportion.
Second that, pretty much all the headlines seem to have gone beyond the findings of the original study. One of them even called beetroot juice "magical" - which much as I love beetroot, it ain't, unless you're referring to the fact that it magically costs even more than posh fruit juice, despite the source crop being way cheaper.
I gather that the current trend for liquidising fruit and veg and drinking them may actually be bad from a dietary point of view. Drinking a smoothie is definitely more of an instant sugar rush than eating a normal piece of fruit, and I can't imagine that the fibre content of veg would be doing much if it's already been broken down by processing.