Study's results seem unsurprising. Junk food isn't good for you regardless of what other foods you eat. Also, the vast majority of what I think of as junk food (chips, candy, sugary drinks, cake and so on) is manufactured from plants. Even lower quality animal foods like fast food CAFO-produced burger patties are consumed typically with buns, sugary drinks, fries....so who's to say which part of the meal caused any possible resulting health problems?